"Mxsmanic" wrote ..
Where in the regulations can I find the requirements for operations over
water
in light GA aircraft? I seem to recall there are restrictions and
equipment
requirements, but I can't find them.


Specify your mission first.
There are different regulations depending on the country, type of water,
class of aircraft, class of operations, and class of pilot licence.

The way to find the information you request is part of the pilots' ground
school. Attend it or read up on the subject.