No building shall be hereafter erected unless a plan shall have previously been submitted to and approved by the Board of Trustees. Such plan shall be drawn to scale and shall show the boundaries of the club property and all topographical features, the location of existing buildings and all proposed buildings, parking fields, roadways and facilities, including those immediately proposed and those contemplated in the future. It shall show the location of the golf course and other existing or proposed facilities and shall contain such other information as the Board of Trustees may require. Such plan shall divide the property into the clubhouse area, in which shall be located all principal and accessory structures, and the golf course area, in which no building shall be constructed other than sheds for storing supplies and equipment used in the maintenance of the golf course and shelters for the protection of the golfers against the weather, and not more than one refreshment stand for the exclusive use of the golfers. Such plan may, from time to time, be amended by the club if such amendments are similarly submitted to and approved by the Board of Trustees.