Security Flight Deck Door - Access Time Delay

[PEBflyer]

Hi all,

I am working for an European operator, flying the B737. I have recently been studying the AFM Supplement regarding the security flight deck door, which states:

"The access time delay is programmable from 15 to 120 seconds in 15-second increments."

And continues:

"The JAA has retricted the time delay programming to 30 seconds only."

Now I would like to know what EASA think of this restriction (most likely the same), but I have been unable to find anything on this so far. Not even in JAA documents (JAR-OPS 1, JAR 25 & JAR 26)

Anyone able to point me in the right direction?