An area bounded by the easterly line of Lot 85, in Section 5, Block D, Tax Map of Nassau County, the northerly line of the Business A Zone to the north of Main Street, thence along the westerly line of Lot 912, in said Section 5, Block D, to a point intersecting a line running from (1) a point that is the intersection of the southerly line of Locust Avenue as extended with the easterly line of Central Drive to (2) a point tangent to curve of the easterly line of Hilltop Road where the southerly leg of that road turns to run in a northerly direction, thence along the latter line to where it intersects the northerly line of the aforesaid Lots 85 and 911.