Grand Canyon National Park has reversed a decision to relax the one-trip-per-year rule during the winter to make unclaimed winter do-it-yourself river trips more attractive. 

The reversal came after three groups representing commercial river services objected to the change. 

The one-trip-per-year rule was adopted by the Park in 2006 as part of the revised Colorado River Management Plan (CRMP), and applies to both commercial passengers and self-guided river runners year round.