When it comes to DEC with a sizeable carrier, the company will have an agreement with its pilots' association or union to protect the futures of its own first officers. This is usually achieved by setting the bar quite high for DEC, type rated may require double the hours a senior FO would need to upgrade and non-type rated will require even more as they are getting a type rating and will possibly be bonded too.
Last edited by parabellum; 21st Feb 2013 at 01:17.