How would I enable this diplomacy action for only the AffinitySophons?

<DiplomaticTermPressureEffectDefinition Name="GeneratePressure" PropositionMethod="Declaration" ApplicationMethod="ProviderOnly" Category="CategoryTreaty" Alignment="Bad">

        <DiplomaticRelationStateEmpirePrerequisite Flags="Prerequisite,Discard" Responsible="RelationOfEmpireWhichProvides">

            <PathPrerequisite Inverted="true">ClassDiplomaticEmpire,GeneratePressureTermActivate</PathPrerequisite>

            <!-- This line can be used and tweaked if you need to count the number of generate pressure currently occurring -->

            <!--<InterpreterPrerequisite>Property(Context,@ClassDiplomaticEmpire,GeneratePressureTermActive) lt 1</InterpreterPrerequisite>-->

        </DiplomaticRelationStateEmpirePrerequisite>        

        <DiplomaticRelationStatePrerequisite Inverted="true" Flags="Prerequisite,Discard" Responsible="EmpireWhichReceives">DiplomaticRelationStateUnknown</DiplomaticRelationStatePrerequisite>

        <DiplomaticMetaPrerequisite Flags="Prerequisite,Discard" Operator="OR">

            <DiplomaticRelationStatePrerequisite>DiplomaticRelationStateColdWar</DiplomaticRelationStatePrerequisite>

            <DiplomaticRelationStatePrerequisite>DiplomaticRelationStatePeace</DiplomaticRelationStatePrerequisite>

            <DiplomaticRelationStatePrerequisite>DiplomaticRelationStateAlliance</DiplomaticRelationStatePrerequisite>

        </DiplomaticMetaPrerequisite>

        <DiplomaticCustomCost Responsible="EmpireWhichProposes" ResourceName="EmpireEmpirePoint">500 * Property(EmpireWhichProposes,@ClassEmpire,DiplomacyCostReduction) * Property(Relation,@ClassDiplomaticEmpire,AggressiveTreatyCostReduction) * Property(Relation,@ClassDiplomaticEmpire,AggressiveTreatyCostReduction) * Property(OtherSideOfRelation,@ClassDiplomaticEmpire,ReceivedAggressiveTreatyCostReduction)</DiplomaticCustomCost>

        <DiplomaticPressureEffectDefinitionReference Name="PressureIncreaseFromDiplomacy"/>

    </DiplomaticTermPressureEffectDefinition>

I *think* I figured it out.  I added the line:

<PathPrerequisite Flags="Prerequisite,Discard">AffinitySophons</PathPrerequisite>

Right under the first.  Is this the correct method?

Thank you!