规定了恒温器、热断路器（TCO）和联合装置的修订术语和要求；还有一个夹子模板，用于在夹子安装单元之间提供互换性。提供温度设置指南，并引入“刻度偏移”的概念，以允许指定标准试验箱和待控制热水器之间的差异。出于健康考虑，规定最低切断温度为60摄氏度。

Specifies revised terminology and requirements for thermostats, thermal cutouts (TCOs) and combined units; also a clip template to provide interchangeability between clip-mounted units. Provides guidance on temperature settings and introduces the concept of 'scale offset' to allow for differences between the specified standard test tank and the water heater to be controlled. A minimum cut-out temperature of 60 degrees Celsius is specified on health grounds.