; and (B) includes a contractor, subcontractor, a temporary service firm, or an employee leasing entity. (3) Covered workplace The term covered workplace includes a workplace with occupational exposure to excessive heat. (4) Employer The term employer has the meaning given the term in section 3 of the Occupational Safety and Health Act of 1970 ( 29 U.S.C. 652 ). (5) Excessive heat The term excessive heat includes outdoor or indoor exposure to heat at levels that exceed the capacities of the body to maintain normal body functions and may cause heat-related injury, illness, or fatality (including heat stroke, heat exhaustion, heat syncope, heat cramps, or heat rashes). (6) Secretary The term Secretary means the Secretary of Labor. 4. Requirements for final standard on prevention of occupational exposure to excessive heat (a) In general The final standard promulgated under section 2(b) shall, at a minimum— (1) take into consideration the NIOSH Criteria for a Recommended Standard: Occupational Exposure to Heat and Hot Environments published by the National Institute for Occupational Safety and Health in 2016; (2) establish requirements with respect to exposure limits that trigger action to protect covered employees from heat-related illness, hydration, scheduled and paid rest breaks in shaded or climate-controlled spaces, an acclimatization plan, exposure monitoring, and other measures to prevent exposure to heat above safe limits, employee and supervisor training, hazard notification, medical monitoring, an emergency medical response plan, heat-related surveillance recordkeeping, procedures for compensating piece rate workers for required heat-related rest breaks, and a heat prevention plan