Section 6304.21 - What special provisions cover aircraft and motorboat use?(a) Subject to such restrictions as BLM determines necessary to protect wilderness values, we may authorize you to land aircraft and use motorboats at places within any wilderness area if these uses were established and active at the time Congress designated the area as wilderness.(b) BLM may also authorize you to maintain, utilizing non-motorized means, aircraft landing strips, heliports or helispots that existed and were in active use when Congress designated the area as wilderness.