Vacation Rules API

Dear All,

We're migrating from 11.5.10.2 to 12.1.3 and we are also creting a new PO an Requisition approval workflows (let´s say POAPPRV_new REQAPRV_new)

We need the old vacation rules created on R11 still working with the old workflows until there is no more old workflows. The new approval process on R12 will then use the POAPPRV_new and REQAPRV_new and we need to re-create the same old vacation rules for those new workflows.

Is there any available workflow API to create vacation rules? We've already searched on Metalink and on the Workflow API Referente Manual but couldn't find anything.