When should timing begin for the first leg outbound in a nonstandard holding pattern?

The correct approach for timing the first leg outbound in a nonstandard holding pattern begins when you are either over the holding fix or abeam it, with the timing initiated based on whichever of these two events occurs later. This is essential for ensuring that the outbound leg timing accounts for the potential variations in flight path or wind drift that could affect the aircraft's position relative to the holding fix.

Starting timing over the holding fix or when abeam allows for a consistent and standardized method to measure the leg times, ensuring adherence to FAA regulations and procedures for holding patterns, which can be critical for maintaining orderly traffic flow and avoiding conflicts in congested airspace.

While the other options may reference important moments during the holding pattern, such as completing turns or fixed distances from the holding fix, they do not align with the specific rule that governs when timing should commence for effective and standardized execution of holding procedures.