See FAA advisory circular AC 20-151A, "Airworthiness Approval of TCAS II, Versions 7.0 & 7.1 and Associated Mode S Transponders":
http://www.faa.gov/documentLibrary/m...%2020-151A.pdf
In particular sections 2-16 "Aircraft Performance Considerations", 2-17 "Evaluating Aircraft Performance" and the bottom of Table 1 Maneuvers on page 16.
This is the text from 2-17 paragraph G:
"g. If Table 1, Maneuver A causes operation at airspeeds below the minimum, then inhibit the CLIMB RA. If Table 1, Maneuver B or C causes operation at airspeeds below the minimum, then inhibit the INCREASE CLIMB RA. However, early recovery of 1 to 2 seconds is of little or no consequence on the collision avoidance maneuver and a higher overall level of safety will be achieved if inhibits are not provided under these circumstances, as previously discussed in paragraph 2-16."
A summary of system inhibits is listed in Table 2, page 18.