Oracle API to load subscription usage lines returns success but does not create subscription usage

We are using OKS_CONTRACTS_PUB API to load service contracts. When the contractor header scs_code is "SUBSCRIPTION" and line level line_type is USAGE then, the API is not inserting any record in line level. When I made a copy of this seeded API,renamed in the development environment and added condition to assign 'OKX_USAGE' value to JTOT_OBJ_CODE - the subscription usage line gets created successfully. I would like to check if this change can be added to  OKS_CONTRACTS_PUB API or if the API supports this change.