BigMike,
The operational standards applying to the Czech Republic is a matter for the Czech Authority; however, being a signatory to Cyprus Convention, the State could be audited by the JAA Operational Standardisation Team and found to be non-compliant (on this issue). The flexibility of implementation (currently being exercised by the Czech Republic and other States) will have to be addressed when European operational standards are unified under EASA - at which time all States will be brought into compliance.
In answer to your question; to operate in PC1 or PC2 in compliance with JAR-OPS 3, the helicopter must have been certificated in Category A. It could be compliant by operating in PC3 - in a non-hostile environment - but that could present problems for a HEMS operator.
The B427 never has, and never will be, certificated in Category A (it is a matter of the design and build standard - Bell took that decision when the helicopter came off the drawing board) - that will have to await the B429; and while we are on the subject the same applies to the B206L4T and the MD900.
If it had not been for your claim about the B427, I for one, would have remained silent on the issue even though the facts were known.
Jim