Section 1203.52 - Scope and effective date(a) This subpart D is effective March 17, 1995, except for § 1203.53(a)(8) , which is effective March 10, 1998. This subpart D shall apply to bicycle helmets manufactured from March 17, 1995, through March 10, 1999, inclusive. Such bicycle helmets shall comply with the requirements of one of the standards specified in § 1203.53 . This subpart shall be considered a consumer product safety standard issued under the Consumer Product Safety Act.(b) The term "bicycle helmet" is defined at § 1203.4(b) .(c) These interim mandatory safety standards will not apply to bicycle helmets manufactured after March 10, 1999. Those helmets are subject to the requirements of Subparts A through C of this part 1203.