Final answer:
29 CFR 1910.120 mandates that certain employers, those involved in hazardous waste operations or emergency responses, are required to implement a Medical Surveillance Program to protect employees from exposure to hazardous substances, not just giving them an option.
Step-by-step explanation:
29 CFR 1910.120 is a regulation that does not give employers the option to develop a Medical Surveillance Program; rather, it requires certain employers to implement one. Specifically, this regulation applies to hazardous waste operations and emergency response situations. Employers engaged in these operations must provide medical surveillance for employees who may be exposed to hazardous substances during their work. This includes providing baseline examinations and periodic examinations, emergency treatment, and consultation for employees.
The emphasis on employee health and safety is underscored by OSHA's regulations, and non-compliance could result in penalties for the employer. Therefore, it is mandatory, not optional, for affected employers to develop a comprehensive Medical Surveillance Program according to the guidelines set forth by 29 CFR 1910.120.