Motor Vehicle Restraint Systems and Booster Seats Safety Regulations

Marginal note:Belt buckles

309 Every belt buckle that is fitted on a belt designed to restrain an infant in an infant restraint system must

• (a) under the conditions set out in section 3 of Test Method 213.1,

  • (i) not release when a force of less than 40 N is applied, and

  • (ii) release when a force of at least 40 N but not more than 62 N is applied;

• (b) under the conditions set out in section 5 of Test Method 213.1, release when a force of not more than 71 N is applied;

• (c) conform to the requirements of S4.3(d)(2) of TSD 209, except that the surface area of a belt buckle designed for push-button application must be at least 385 mm²;

• (d) conform to the requirements of S4.3(g) of TSD 209; and

• (e) not release during the dynamic tests specified in section 4 of Test Method 213.1.