From 29.1 Applicability
(e) Rotorcraft with a maximum weight of
9072 kg (20 000 pounds) or less but with 10 or
more passenger seats may be type certificated as
Category B rotorcraft provided the Category A
requirements of CS 29.67(a)(2), 29.87, 29.1517,
and of Subparts C, D, E, and F are met.
Read the rules (understand the text) and follow the threads. You will find that the
specified rules
equate to the performance for Pure PC2 (with the condition of the surface defined only in operations regulations). This is because compliance with 29.1517 establishes a Limitation in the Flight Manual (which is required by regulations to be observed). Alleviation from 29.1517 may be provided by operational regulations under specified circumstances.
(f) Rotorcraft with a maximum weight of
9072 kg (20 000 pounds) or less and nine or
less passenger seats may be type certificated as
Category B rotorcraft.
These rules
equate to Pure PC3 if the
published Category B take-off and landing procedures are followed, and PC3 with exposure if they are not.