Newly proposed federal regulations aimed at the snack foods and drinks served in the nation’s schools could come with a hefty price tag.

The American Action Forum estimates the regulations, which include caps on serving sizes and calorie counts, will cost schools $127 million and require more than 926,000 hours of paperwork.

Sam Batkins, director of regulatory policy at the institute, says the proposals amount to yet another unfunded federal mandate for state and local governments, “at a time when many of their budgets are still struggling.”

The Food and Nutrition Service regulations would be administered by the U.S. Department of Agriculture, which says schools in at least 39 states already have some kind of snack food standards in place. Thousands of schools “have already taken voluntary steps towards meeting the proposed standards,” the department said, adding that many of the schools have started making the changes with little or no impact to their revenue.

The new proposals come as a part of a second wave of regulations stemming from the Healthy, Hunger-Free Kids Act of 2010. Administrators are still working to comply with a number of other mandates that have significantly changed school food options in recent years. They include a requirement that each student take a serving of fruit or vegetable as part of their lunch or the federal government may not reimburse the cost — driving up prices for both students and school districts.