In which document will you find the requirements for Alternate Airport IFR weather minimums?

The requirements for Alternate Airport IFR weather minimums are found in Ops Spec C055. This document specifically outlines the conditions that must be met for an airport to qualify as an alternate when conducting IFR flights, including the minimum weather conditions necessary for landing at those alternate airports. Understanding this specification is crucial for ensuring compliance during flight planning and operations, as it directly affects the safety and regulatory adherence of flight crews.

In contrast, other operations specifications such as C045 and C035 focus on different areas related to flight operations and aircraft utilization rather than specifically detailing the alternate airport weather minimums. Ops Spec C065 typically deals with instrument approach procedures and associated requirements but does not cover alternate airport minimums. Thus, Ops Spec C055 is the definitive source for this information, making it the correct answer.