Westie,
This FAA InFO Letter (link below) should answer the question. Also, FAA AIM 5-4-7 as reference, which says and I quote,
If it is necessary to operate at a speed in excess of the upper limit of the speed range for an aircraft's category, the minimums for the higher category should be used. This may occur with certain aircraft types operating in heavy/gusty wind, icing, or non-normal conditions. For example, an airplane which fits into Category B, but is circling to land at a speed of 145 knots, should use the approach Category D minimums.
“Should” being the operative word, it’s not mandatory.
https://www.faa.gov/sites/faa.gov/files/InFO23001.pdf