Hi Ray Ban,
I'm presuming (always dangerous) that your in the UK and therefore dealing with the UK CAA....with that in mind the section you need to refer to is in the UK CAP804 (Flight Crew Licensing), Section 3, Part K - this deals with the issue of expiring licences. As for the LPC - invalid i'd suspect i'm afraid, but there may be someone far brighter than me on here that can advise.
F/o
Last edited by First.officer; 2nd Feb 2013 at 20:20.