571—40.44 (462A) Three Mile Lake, Union County—watercraft use. Motorboats of outboard or inboard-outdrive type shall be permitted on Three Mile Lake. The following rules shall govern vessel operation on Three Mile Lake in Union County.
	 40.44(1) All vessels shall be operated at a no-wake speed when within 50 feet of another vessel which is not underway or is operating at a no-wake speed.
	 40.44(2) Zoned areas.
	  a.   	 No vessel, except authorized emergency vessels, shall be permitted in areas specifically designated for swimming and wading which are plainly marked by use of regulatory buoys in accordance with Iowa Administrative Code 571—Chapter 41. The Union County conservation board shall designate and maintain a swimming area(s) by the use of regulatory buoys approved by the natural resource commission.
	  b.   	 No motorboats, except authorized emergency vessels, shall be operated in marked bay areas at a speed greater than the limit designated by buoys or signs marking said bay. No motorboats, except authorized emergency vessels, shall be operated other than at a no-wake speed above a line of buoys placed across the lake at the point where County Road H33 intersects the lake. All buoys or signs shall be in accordance with 571—Chapter 41.
	  c.   	 No motorboats, except authorized emergency vessels, shall be operated in restricted speed areas between the nearest shore and a line designated by regulatory buoys or signs at a speed greater than the limit designated on the buoys or signs marking the area. Such zoned areas shall be not less than 50 feet nor more than 400 feet from shore. Said buoys or signs shall be in accordance with 571—Chapter 41.