Hi @andrew.hoeing1 ,

I presume you are asking about the DSS C# SDK. Yes, when an instrument identifier list is created, the last boolean parameter allows you to define if user preferences are to be used or not.

Signature:

public static InstrumentIdentifierList Create(DssCollection<InstrumentIdentifier> instrumentIdentifiers, InstrumentValidationOptions validationOptions, bool useUserPreferencesForValidationOptions);

Use (setting it to false and using specified validation rule):

IdentifierList = InstrumentIdentifierList.Create(
new[]
{
  new InstrumentIdentifier { Identifier = "191216100", IdentifierType = IdentifierType.Cusip },
  new InstrumentIdentifier { Identifier = "2005973", IdentifierType = IdentifierType.Sedol },
  new InstrumentIdentifier { Identifier = "AAPL.OQ", IdentifierType = IdentifierType.Ric }
}, 
new InstrumentValidationOptions
{
  UseExchangeCodeInsteadOfLipper = true,
  AllowHistoricalInstruments = false,
  AllowOpenAccessInstruments = false,
  ExcludeFinrAsPricingSourceForBonds = false,
  UseConsolidatedQuoteSourceForCanada = false,
  UseConsolidatedQuoteSourceForUsa = false,
  UseUsQuoteInsteadOfCanadian = true
}, 
false);