Meetings of the Board of Supervisors are held on Tuesdays at a.m. For regular meetings, the agenda must be posted 72 hours in advance.Stay informed with the Los Angeles Board and Commission Meetings Calendar about previous meetings and agendas. Board Meeting Agendas will be posted at least 10 days prior to meeting. Meeting materials will be posted several days before meeting. Fill out the contact form or call us at 818-891-9504 to schedule your consultation. Documents on file in the Executive Office. Supervisor Hilda L. Solis. NOTICE IS HEREBY GIVEN that the Chairperson of the Services Agreement Committee of the.