The Senior Boy Scout program was replaced by the Leadership Corps. Initially the Leadership Corps was limited to leaders 14–15; older boys were expected to become junior assistant Scoutmasters or move to Exploring. The Leadership Corps could wear the forest green shirt with a Scout BSA strip until it was discontinued in 1979. The Leadership Corps patch was worn in place of the patrol patch, The first version of the patch was trapezoidal, replaced by a round patch in 1987. The red beret was initially introduced for the Leadership Corps, and extended for troop wear in 1973.