Westlake Lake Management Association manages the lake and all rules and regulations are established by the association.  Rules for boats on the lake are as follows:

No boat that exceeds eighteen feet in overall length or exceeds eight feet six, inches in maximum beam may be on the Lake. Exceptions are: (a) work boats of Westlake Lake Management Association "WLMA" and (b) rowing shells which may exceed the eighteen foot limitation at the written approval of WLMA.

Prohibited completely are multi-hulled sailboats, inflatable boats or rafts, wind-surfers, surfboards, jet-skis, standup paddleboards and water skiers. Any such porhibited category of watercraft or activity on the Lake will be considered an immediate safety hazard under the Rules.

All power boats must be electrically propelled except for those used by WLMA, any approved boat service concessionaire licensed by WLMA, and the Westlake Yacht Club chase boat involved with regattas and sailing activities.

In 1968, Mr. Ludwig formed and initially controlled Westlake Lake Management (WLMA), a nonprofit California corporation, to ultimately own and manage the new lake.  In 1974, Ludwig turned over all membership and control of WLMA to area homeowners and a commercial property owner adjacent the lake, and transferred ownership of Westlake Lake to WLMA.

Mr. Ludwig set up WLMA's structure to consist of over 1300 members when development was fully built out – compromised of the homeowners owning property in seven residential districts laid out around the lake including the island and a commercial district called the The Landing.  Each of these eight districts is represented on the WLMA Board of 33 members.  The Board works with the leadership of the seven homeowners' associations governing the residential districts around the lake. Currently 1300 homes front on or have ready access to the lake within the seven districts.