The governing board of every school district shall allow each teacher employed for full time in any regular day school in which two or more teachers are employed, one duty-free lunch period each day in the manner and at the time prescribed by regulation of the State Board of Education.
The State Board of Education shall adopt rules and regulations fixing the duration of the duty-free lunch period of certificated employees of school districts, the time of day when the lunch period shall be granted, and prescribing the conditions under which the duty-free lunch period shall be allowed.