This is the zoning map taken from their site before it went down. Below are the rules:
Calaveras Lake is zoned for different water activities - TPWD REGULATIONS ALSO APPLY.
ZONE 1 is reserved for fishing, motor boating, wind and kite surfing, waterskiing and personal watercraft use. NO trotlines, juglines or throwlines allowed.
ZONE 2 is reserved for motor boating and fishing, including
trotlines, juglines or throwlines. NO waterskiing, sail or wind surfing or personal watercraft is allowed.
ZONE 3 is controlled by CPS Energy and is off limits to recreationists. Do not enter this area.
Unfortunately they do not enforce the rules so many people just do not follow them any more. Sad.....