The FAW's National Leagues Board has confirmed that JD Cymru South and North clubs will be permitted to make five substitutions in matches, in accordance with the Laws of the Game, until the end of the 2020-21 season, should the leagues return.
The decision comes after the Board confirmed its implementation in the JD Cymru Premier last month ahead of its return after the top-flight had its 'Elite Status' reinstated.
FIFA extended the use of the rule, which was first introduced following the COVID-19 outbreak, citing "player welfare" as part of the reason for the temporary amendment to Law 3 of the Laws of the Game.
FIFA stated that "Some competitions which resumed in 2020 may have a shorter-than-usual recovery/preparation period before the start of their next season."
"For many competitions, the 2020/21 season will involve matches being played in a condensed period due to a delayed start and the inability to end later than usual because of major international tournaments."
The Tier 2 leagues will be permitted to restart if the country moves to Alert Level 3 at the next Welsh Government Coronavirus Review, or if its 'Elite Status' is reinstated, whichever comes soonest.