The development of the scope of work for the appraisal assignment must involve participation by the acquiring agency (49 CFR 24.103 (a) (1)). In the assignment and negotiation of a work authorization with the appraiser, the staff reviewer will discuss with the appraiser the expected and reasonable scope of work for the property to be appraised. The agreed upon scope of work shall be included in the work authorization under number 9, Additional Requirements, and shall become the minimum requirements for the appraisal assignment. The appraiser may add additional tasks in the scope of work to be disclosed in the appraisal report during the performance of the appraisal process. If any of the items within the scope of work in the work authorization become unnecessary or unattainable, the appraiser should notify ROW PD of its exclusion.