South Africa, July 6 -- Among the tournament's lesser-known requirements is Fifa's "clean stadium" policy, which requires host venues to remove or conceal branding belonging to companies that are not official tournament sponsors.

Among the tournament's lesser-known requirements is Fifa's "clean stadium" policy, which requires host venues to remove or conceal branding belonging to companies that are not official tournament sponsors.

The rule has placed a spotlight on stadium naming rights and corporate branding, with venues across North America temporarily shedding their commercial identities in favour of names linked to their host cities.

One of the most talked-about examples is Levi's Stadium in Santa Clara, California. Although the v...