Value of unclassed DP experience?

From the NI site, FAQ section on applying for DPO:

     "[B]Is watchkeeping time accrued on board any DP equipped vessel eligible to gain a DP certificate?[/B]

      "Only watchkeeping time gained working as a DPO on board vessels officially classed as DP by one of the classification societies will be counted towards your required time."  

Sending in a copy of your vessel’s DP Certificate of Classification should do it.

and it must be on a DP contract - which they might check
So how do you put a non DP classed DP vessel on a DP contract - you cant

I did exactly this. It only took 2 or 3 weeks after I sent in the ABS cert until my ship was in the database.