Proposition 64 explicitly states that it is intended to “allow public and private employers to enact and enforce workplace policies pertaining to marijuana.” The initiative also provides that it will not be construed or interpreted to amend, repeal, affect, restrict or preempt:

The rights and obligations of public and private employers to maintain a drug and alcohol free workplace or require an employer to permit or accommodate the use, consumption, possession, transfer, display, transportation, sale, or growth of marijuana in the workplace, or affect the ability of employers to have policies prohibiting the use of marijuana by employees and prospective employees, or prevent employers from complying with state or federal law (Section 11362.45 (f)).