diff --git a/src/server/rater/DslRater.js b/src/server/rater/DslRater.js
index 490cd80..7c430bb 100644
--- a/src/server/rater/DslRater.js
+++ b/src/server/rater/DslRater.js
@@ -115,7 +115,8 @@ module.exports = Class( 'DslRater' )
         {
             try
             {
-                var single = rater( data );
+                var can_term = context.canTerm();
+                var single   = rater( data, can_term );
 
                 // ensures that any previous eligibility errors are cleared out
                 single.ineligible = '';
diff --git a/src/server/rater/DslRaterContext.js b/src/server/rater/DslRaterContext.js
index 79dfaef..ebc5d88 100644
--- a/src/server/rater/DslRaterContext.js
+++ b/src/server/rater/DslRaterContext.js
@@ -37,13 +37,13 @@ module.exports = Class( 'DslRaterContext' )
      * Hash of classes that will result in a global submit
      * @type {Object}
      */
-    'private _globalSubmits': {},
+    'private _global_submits': {},
 
     /**
      * Whether a particular global submit has been triggered
      * @type {Object}
      */
-    'private _hasGsubmit': {},
+    'private _has_g_submit': {},
 
     /**
      * Rater corestrictions
@@ -57,6 +57,12 @@ module.exports = Class( 'DslRaterContext' )
      */
     'private _data': null,
 
+    /**
+     * Whether to immediately terminate on assertion failure
+     * @type {boolean}
+     */
+    'private _can_term': true,
+
     /**
      * Result sets
      * @type {Object}
@@ -67,18 +73,19 @@ module.exports = Class( 'DslRaterContext' )
      * Number of available results
      * @type {number}
      */
-    'private _availCount': 0,
+    'private _avail_count': 0,
 
     /**
      * Total number of results
      * @type {number}
      */
-    'private _totalCount': 0,
+    'private _total_count': 0,
 
 
-    __construct: function( data )
+    __construct: function( data, can_term )
     {
-        this._data = data;
+        this._data    = data;
+        this._can_term = ( can_term == undefined ) ? true : !!can_term;
         this.init();
     },
 
@@ -90,6 +97,12 @@ module.exports = Class( 'DslRaterContext' )
     },
 
 
+    'public canTerm': function()
+    {
+        return this._can_term;
+    },
+
+
     'virtual protected init': function()
     {
         // may be implemented by subtypes
@@ -118,8 +131,8 @@ module.exports = Class( 'DslRaterContext' )
      */
     'public addResultSet': function( name, set )
     {
-        this._totalCount += set.getResultCount();
-        this._availCount += set.getAvailableCount();
+        this._total_count += set.getResultCount();
+        this._avail_count += set.getAvailableCount();
 
         this._checkGlobalSubmits( set );
 
@@ -146,11 +159,11 @@ module.exports = Class( 'DslRaterContext' )
                 return;
             }
 
-            for ( var cname in _self._globalSubmits )
+            for ( var cname in _self._global_submits )
             {
                 if ( result.__classes[ cname ] )
                 {
-                    _self._hasGsubmit[ cname ] = true;
+                    _self._has_g_submit[ cname ] = true;
                 }
             }
         } );
@@ -162,7 +175,7 @@ module.exports = Class( 'DslRaterContext' )
         var i = submits.length;
         while ( i-- )
         {
-            this._globalSubmits[ submits[ i ] ] = true;
+            this._global_submits[ submits[ i ] ] = true;
         }
 
         return this;
@@ -185,8 +198,8 @@ module.exports = Class( 'DslRaterContext' )
     'public complete': function()
     {
         // allow context some time to manipulate the results mercilessly
-        this._availCount = this.processCompleted(
-            this._results, this._availCount
+        this._avail_count = this.processCompleted(
+            this._results, this._avail_count
         );
 
         this._processGlobalSubmits();
@@ -291,7 +304,7 @@ module.exports = Class( 'DslRaterContext' )
      */
     'private _processGlobalSubmits': function()
     {
-        for ( var cname in this._hasGsubmit )
+        for ( var cname in this._has_g_submit )
         {
             this._results.forEach( function( set )
             {
@@ -302,7 +315,7 @@ module.exports = Class( 'DslRaterContext' )
                         cname;
 
                     result._unavailable = '1';
-                    this._availCount--;
+                    this._avail_count--;
                 } );
             } );
         }
@@ -340,7 +353,7 @@ module.exports = Class( 'DslRaterContext' )
 
         } );
 
-        ret.__prem_avail_count = [ this._availCount ];
+        ret.__prem_avail_count = [ this._avail_count ];
 
         return ret;
     }
diff --git a/test/server/rater/DslRaterContextTest.js b/test/server/rater/DslRaterContextTest.js
new file mode 100644
index 0000000..3481831
--- /dev/null
+++ b/test/server/rater/DslRaterContextTest.js
@@ -0,0 +1,66 @@
+/**
+ * Tests DslRaterContext
+ *
+ *  Copyright (C) 2010-2019 R-T Specialty, LLC.
+ *
+ *  This file is part of the Liza Data Collection Framework.
+ *
+ *  liza is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+'use strict';
+
+const root   = require( '../../..' );
+const expect = require( 'chai' ).expect;
+
+const {
+    DslRaterContext: Sut,
+} = root.server.rater;
+
+describe( 'DslRaterContext', () =>
+{
+    describe( 'Defaults', () =>
+    {
+        it( `canTerm is true if not included`, () =>
+        {
+            const expected = true;
+            const data     = { foo: 'bar' };
+            const sut      = Sut( data );
+            const actual   = sut.canTerm();
+
+            expect( actual ).to.equal( expected );
+        } );
+
+
+        it( `canTerm can be set to false`, () =>
+        {
+            const expected = false;
+            const data     = { foo: 'bar' };
+            const sut      = Sut( data, expected );
+            const actual   = sut.canTerm();
+
+            expect( actual ).to.equal( expected );
+        } );
+
+
+        it( `data can be retrieved`, () =>
+        {
+            const expected = { foo: 'bar' };
+            const sut      = Sut( expected );
+            const actual   = sut.getSourceData();
+
+            expect( actual ).to.deep.equal( expected );
+        } );
+    } );
+} );
diff --git a/test/server/rater/DslRaterTest.js b/test/server/rater/DslRaterTest.js
new file mode 100644
index 0000000..6e83b00
--- /dev/null
+++ b/test/server/rater/DslRaterTest.js
@@ -0,0 +1,245 @@
+/**
+ * Tests DslRater
+ *
+ *  Copyright (C) 2010-2019 R-T Specialty, LLC.
+ *
+ *  This file is part of the Liza Data Collection Framework.
+ *
+ *  liza is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+'use strict';
+
+const root   = require( '../../..' );
+const expect = require( 'chai' ).expect;
+const Class  = require( 'easejs' ).Class;
+
+const {
+    DslRater: Sut,
+    DslRaterContext,
+} = root.server.rater;
+
+describe( 'DslRater', () =>
+{
+    describe( 'rate', () =>
+    {
+        it( `Calls context#rate`, () =>
+        {
+            let called = false;
+
+            const raters    = [ getRaterStub(), getRaterStub() ];
+            const resultSet = getResultSetStub();
+            const override  = {
+                'override public rate': function( name, meta, rate, complete )
+                {
+                    called = true
+                }
+            };
+
+            const context = getDslContext( override );
+            const sut     = Sut( raters, resultSet );
+
+            sut.rate( context );
+
+            expect( called ).to.equal( true );
+        } );
+
+
+        it( `Throws exception on invalid context`, () =>
+        {
+            const raters    = [ getRaterStub(), getRaterStub() ];
+            const resultSet = getResultSetStub();
+            const context   = {};
+            const sut       = Sut( raters, resultSet );
+
+            expect( () => { sut.rate( context ) } )
+                    .to.throw( "Invalid DslRaterContext provided" );
+
+        } );
+
+
+        it( `Undefined rater calls context#complete`, () =>
+        {
+            let called     = false;
+            let rateCalled = false;
+
+            const raters    = [ undefined ];
+            const resultSet = getResultSetStub();
+            const override  = {
+                'override public rate': function( name, meta, rate, complete )
+                {
+                    rateCalled = true
+                },
+
+                'override public processCompleted': function( results, count )
+                {
+                    called = true
+                }
+            };
+
+            const context = getDslContext( override );
+            const sut     = Sut( raters, resultSet );
+
+            sut.rate( context );
+
+            expect( called ).to.equal( true );
+            expect( rateCalled ).to.equal( false );
+        } );
+
+
+        it( `Calls rater with canTerm from context`, () =>
+        {
+            let actual;
+
+            const expected = false;
+            const callback = ( data, canTerm ) =>
+            {
+                actual = canTerm;
+                called = true;
+            }
+
+            const raters    = [ getRaterStub( callback ) ];
+            const resultSet = getResultSetStub();
+            const context   = DslRaterContext( null, expected );
+            const sut       = Sut( raters, resultSet );
+
+            sut.rate( context );
+
+            expect( actual ).to.equal( expected );
+        } );
+
+
+        it( `Submit or prohibit sets _unavailable flag`, () =>
+        {
+            let called = false;
+            let actual = {};
+
+            const expected  = {
+                _unavailable: '1',
+                ineligible:   '',
+                submit:       'true',
+                __classes: {
+                    'submit':     true,
+                    'submit-foo': true,
+                },
+            };
+            const raterCb   = ( _, __ ) => {};
+            const resultCb  = ( name, set ) =>
+            {
+                actual = name;
+                called = true;
+            };
+            const classes   = {
+                'submit-foo': true,
+                submit:       true,
+            };
+            const raters    = [ getRaterStub( raterCb, classes ) ];
+            const resultSet = getResultSetStub( resultCb );
+            const context   = DslRaterContext( null, expected );
+            const sut       = Sut( raters, resultSet );
+
+            sut.rate( context );
+
+            expect( called ).to.equal( true );
+            expect( actual ).to.deep.equal( expected );
+        } );
+    } );
+
+
+    it( `_unavailable flag defaults to false`, () =>
+    {
+        let called = false;
+        let actual = {};
+
+        const expected  = {
+            _unavailable: '0',
+            ineligible:   '',
+            submit:       '',
+            __classes: {
+                'foo':    true,
+                'submit': false,
+            },
+        };
+        const raterCb   = ( _, __ ) => {};
+        const resultCb  = ( name, set ) =>
+        {
+            actual = name;
+            called = true;
+        };
+        const classes   = {
+            'foo':  true,
+            submit: false,
+        };
+        const raters    = [ getRaterStub( raterCb, classes ) ];
+        const resultSet = getResultSetStub( resultCb );
+        const context   = DslRaterContext( null, expected );
+        const sut       = Sut( raters, resultSet );
+
+        sut.rate( context );
+
+        expect( called ).to.equal( true );
+        expect( actual ).to.deep.equal( expected );
+    } );
+
+
+    function getRaterStub( callback = ( _, __ ) => {}, classes = [] )
+    {
+        let raterStub = ( function()
+        {
+            var raterStub = function( data, canTerm )
+            {
+                callback( data, canTerm );
+
+                return {
+                    __classes: classes
+                };
+            }
+
+            raterStub.supplier = 'bar';
+            raterStub.rater    = {
+                meta: 'foo',
+                classify: {
+                    desc: classes
+                },
+            };
+
+            return raterStub;
+        } )();
+
+        return raterStub;
+    }
+
+
+    function getResultSetStub( callback = ( _, __ ) => {} )
+    {
+        return ( str ) => {
+            return {
+                addResult( name, set ){
+                    callback( name, set );
+                }
+            }
+        };
+    }
+
+
+    function getDslContext( override, data, canTerm )
+    {
+        const ContextCtr = Class( 'DummyDslRaterContext' ).extend(
+            DslRaterContext,
+            override
+        );
+
+        return ContextCtr( data, canTerm );
+    }
+} );