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This conversion of a vague locality description into a single subjective point creates the problem of false precision , often to a scientifically unacceptable degree . The Cameroon study was conducted in the dry season , while the Bioko study was conducted in the wet season , so the studies are not completely comparable , but the richness of the Bioko fauna is undeniable . The reflecting of the lip ( when present ) usually occurs when the animal approaches adulthood . In exceptional circumstances , the Secretary of the Treasury may waive this requirement with respect to obligations that the Secretary determines : ( 1 ) Are not suitable for investment for the FFB because of the risks entailed in such obligations ; or ( 2 ) are , or will be , financed in a manner that is least disruptive of private finance markets and institutions ; or ( 3 ) are , or will be , based on the Secretary 's consultation with OMB and the guaranteeing agency , financed in a manner that will best meet the goals of the program .