(a) A lighter subject to this part 1210 shall be resistant to successful operation by at least 85 percent of the child-test panel when tested in the manner prescribed by § 1210.4.

(b) The mechanism or system of a lighter subject to this part 1210 that makes the product resist successful operation by children must:

(1) Reset itself automatically after each operation of the ignition mechanism of the lighter,

(2) Not impair safe operation of the lighter when used in a normal and convenient manner,

(3) Be effective for the reasonably expected life of the lighter, and

(4) Not be easily overriden or deactivated.