As soon as employee puts leave, it should go to line manager for approval. After line manager it should go to HRBS (Human Resource Business Support). For one CC, there can be many HRBS people. HRBS data is stored in some other system. Data can be accessed directly from EBS database. Data is not stored in Transaction Roles.
Below solution considers using table type to fetch HRBS and fetch in AME.
First responder wins in oracle ame - using table types 2013-12-04
First responder wins in oracle ame - using table types