The Object Management Group (OMG) created its OCSMP certifications in coordination with INCOSE. To encourage individuals to get both certifications, the programs offer a discount. Applicants who already have one certification should notify the other organization of that status when they apply. They will then get a 10% on the application fee (INCOSE) or exam fee (OMG) for the second certification. 

https://www.omg.org/incose-omg-mutualrecog/