In special cases where the displacing Agency determines it to be reasonable and necessary, certain additional categories of searching costs may be considered for reimbursement. These include those costs involved in investigating potential replacement sites and the time of the business owner, based on salary or earnings, required to apply for licenses or permits, zoning changes, and attendance at zoning hearings. Necessary attorney fees required to obtain such licenses or permits are also reimbursable. Time spent in negotiating the purchase of a replacement business site is also reimbursable based on a reasonable salary or earnings rate. In those instances when such additional costs to investigate and acquire the site exceed $2,500, the displacing Agency may consider waiver of the cost limitation under the § 24.7, waiver provision. Such a waiver should be subject to the approval of the Federal-funding Agency in accordance with existing delegation authority.