the United States, the Administrator of the United States Small Business Administration, or the United States Secretary of Agriculture shall increase the portfolio of loan guarantees where the dollar amount of the loan is less than one hundred thousand dollars ($100,000), so that at least 15 percent of the dollar value of loans guaranteed by the corporation is for those loans. The corporation shall comply with this requirement within one year of the date the emergency or disaster is declared. Upon application of a corporation, the executive director may waive or modify the rule for the corporation if the corporation demonstrates that it made a good faith effort to comply and failed to locate lending institutions in the region that the corporation serves that are willing to make guaranteed loans in that amount.