{{companyInfoFormGroup.controls.companyName.errors.cusip.message}}
If you want to apply conditional validation on 'Microsoft Corporation Cusip Code' then you need to add 'Company Name' input as 'Microsoft'.
Conditional Expression with type 'string'
{{companyInfoFormGroup.controls.microsoftCorporationCusipCode.errors.cusip.message}}
If you want to apply conditional validation on 'Google Inc. Cusip Code' then you need to add 'Company Name' input as 'Google'.
Conditional Expression with type 'function'
{{companyInfoFormGroup.controls.googleIncCusipCode.errors.cusip.message}}