Police Ops are specifically excluded from JAR-OPS 3. Some national authorities choose to regulate police ops as some sort of quasi-CAT, but most consider it a "state" operation and fully exempt.
My suggestion is the the change you mention is unlikely to change any national police ops significantly in EASA/JAA land. Have you any info that makes you think things will change?
What you seem to be talking about is CAT at night, operated by a commercial operator. If that is correct, I cannot see it having any effect. Single engine CAT will still be a no-no, whatever the flight rules.
If you operate under a JAR-OPS 3 AOC, you need to comply with no SE at night, I would have thought.
The change in flight rules options you mention is basically a UK-only change which came about because the UK had an unusual requirement for night flying. If the rules have changed for you, I am assuming you are in the UK. If that is so, it will make no difference at all, unless you are going to do some sort of flying that requires neither an AOC or a PAOC. I cannot see how "police operations" would be anything other than AOC or PAOC operations.
The actual answer may be affected by the country of operation, which you have not mentioned.
Last edited by Helinut; 16th September 2012 at 18:11.
Reason: Typos & another thought