24.1. Despite section 24, in the case of any portion of a trail having a steep ascending slope of 17% or more, that portion is signposted by means of warning and regulatory signs erected in the following order:
(1) a D-230-11 sign is erected 150 m before the requirement begins;
(2) a P-130-58 sign accompanied by a P-245-P-2 tab sign is erected 75 m before the requirement begins;
(3) a P-130-58 sign is erected where the requirement begins;
(4) a P-130-58 sign accompanied by a P-230-P tab sign is erected where the requirement ends.
For the purposes of subparagraphs 1 and 2 of the first paragraph, an off-highway vehicle club may have the distances provided for in those subparagraphs varied by plus or minus 10%.