I understand about PICUS time (which is different to P1 under JAR however logged in the P1 column), but they are specifying 500hours PIC on a/c with MTOW > 20t which makes me think they are looking for guys who have had command of a small turboprop commuter - beach1900 or similar.
Think its unlikely they are going to find enough FO for 54 aircraft who meet this requirement and seems silly to turn away experienced Jet guys (especially rated) who have flown in the region too - but who am i to say!!
If any one has any info from the company directly would be interested to hear it!