addition to any contributions by Franchisee to the Advertising Fund, Franchisee is required to spend on marketing and related programs such amount as is required pursuant to the terms and conditions of Franchisee's lease or sublease. Franchisee acknowledges such amounts will vary from lease to lease, and therefore, all Pretzel Time Unit franchisees will not be obligated to expend the same amount on local advertising and marketing of the Unit. 11.F. USE OF TRADEMARK REFERENCES AND APPROVAL OF FRANCHISEE'S MARKETING. Franchisee further agrees that all advertising, promotion and marketing by Franchisee shall be completely clear and factual and not misleading and shall conform to the highest standards of ethical marketing and promotion policies which may be prescribed from time to time by Pretzel Time. Franchisee agrees to use the registration symbol of "R" within a circle (7 ) in connection with its use of the Marks. Franchisee agrees to refrain from any business or marketing practice which may be injurious to the business of Pretzel Time and the good will associated with the Marks and other Pretzel Time Units. Prior to their use by Franchisee, all press releases, literature, and samples of all local advertising, marketing, point-of-purchase, and related materials not prepared or previously approved by Pretzel Time shall be submitted to Pretzel Time for approval, which shall not be unreasonably withheld. If written disapproval is not received within twenty (20) days from the date of receipt by Pretzel Time of such materials, Pretzel Time shall be deemed to have approved the materials. Franchisee agrees not to use promotional or advertising materials which have been disapproved by Pretzel Time or that have not been approved for use within the preceding twelve months. In addition, any pamphlets, brochures, cards or other promotional materials offering free Products may only be used if