LED marquee retrofits in Las Vegas, repair, re-face or replace an aging sign

How Las Vegas resort and casino owners, architects and GCs decide whether an aging LED marquee or video wall needs module repair, a re-face on the existing structure or full replacement, with permits, phasing and what a retrofit bid should show.
How to specify an LED marquee sign in Las Vegas, from pixel pitch to permit

A specification guide for owners, architects and GCs: pixel pitch, brightness and dimming, structure and wind, power and NEC 600, controls, service access and permits for a Las Vegas LED marquee.