36 CFR §51.37

1. (a)The new concession contract provides for the continuation of the visitor services authorized under a previous concession contract. The visitor services to be continued under the new contract may be expanded or diminished in scope but, for purposes of a qualified concession contract, may not materially differ in nature and type from those authorized under the previous concession contract; and either
2. (b)The new concession contract that is to replace the previous concession contract is estimated to result in, as determined by the Director, annual gross receipts of less than $500,000 in the first 12 months of its term; or
3. (c)The new concession contract is an outfitter and guide concession contract as described in this part.