(a) Name. The name of the viticultural area described in this section is “Merritt Island.”

(b) Approved maps. The appropriate maps for determining the boundaries of the Merritt Island viticultural area are two U.S.G.S. maps, 7.5 minute series. They are entitled:

(1) “Clarksburg Quadrangle, California,” 1967 (Photo revised 1980); and

(2) “Courtland Quadrangle, California,” 1978.

(c) Boundaries. The Merritt Island viticultural area is located in Yolo County, California, six miles south of the City of Sacramento. The boundaries of the Merritt Island viticultural area, using landmarks and points of reference found on the appropriate U.S.G.S. maps, are as follows:

(1) Starting at the most southernly point, the intersection of Sutter Slough with the Sacramento River.

(2) Then west along the course of Sutter Slough for 0.54 miles until it intersects Elk Slough.

(3) Then northeast along the course of Elk Slough for 9.58 miles to the community of Clarksburg and the intersection of Sacramento River.

(4) Then southeasterly along the course of the Sacramento River for 7.8 miles to the beginning point.