1. Inspection: "Evaluating Wind Resistance of Metal Edge Flashing" is a useful two-page explanation of what to look for and what to do about what you find. Available on the website of the Insurance Institute for Business & Home Safety.
2. Standards: ANSI/SPRI/FM 4435/ES-1 "Wind Design Standard for Edge Systems Used with Low Slope Roofing Systems" (2011) can be seen on the Metal-Era website.