Before establishing or changing the standards of quality, weight, and size requirements for Rhode Island consumer grades for shell eggs, the director shall hold a public hearing, notice of which shall be given in a newspaper of statewide circulation. The specifications for consumer grades and weight classes and the standards for quality of individual eggs shall be those promulgated by the U.S. Department of Agriculture as set forth in the regulations governing the grading of shell eggs and the U.S. standards, grades, and weight classes for shell eggs (7 C.F.R. part 56).