Time limits are unique for each applicant although the most common is 30days. Mine was 60days also ...
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Take it as it is, it give you more time to heal after surgery and prepare for the IME. Note reading closely in the instructions that the 60 day limit or any MR/IME limit specifies only to "make arrangements" or schedule your IME, not up to the time when MR/IME results should be sent and received at CEM/CIC. I read it as to schedule and complete the IME within the period specified in the instructions, but does not include the submission of IME/MR results to CEM/CIC.
/..atb