Over 100 business groups representing manufacturers, distributors and the supply chain of products to combat the coronavirus pandemic are calling for a consistent definition of "critical infrastructure" from the Department of Homeland Security (DHS).

A uniform definition would prevent state and local government actions from threatening the supply of critical products, the American Chemistry Council, American Petroleum Institute, Beer Institute, Distilled Spirits Council of the U.S. and others explained in a letter to President Trump Donald John TrumpBubba Wallace to be driver of Michael Jordan, Denny Hamlin NASCAR team Graham: GOP will confirm Trump's Supreme Court nominee before the election Southwest Airlines, unions call for six-month extension of government aid MORE on Wednesday.

“It is imperative that the federal, state and local governments come together with uniform definitions of ‘critical infrastructure’ making clear what manufacturers must continue to operate, as well as take seriously the need to transport those products and have the workforce available to keep operations running,” they said.

The groups also called for states to adopt the definition of “critical infrastructure” as defined by DHS, commit to not create any barriers to the transportation of products from manufacturing facilities to retailers, and ensure that curfews do not impede a healthy workforce during necessary hours of operation for manufacturing facilities and retailers.

Other groups on the letter include the Consumer Brands Association, American Wood Council, Glass Packing institute, Hardwood Federation, Household & Commercial Products Association, National Mining Association, National Propane Gas Association, Pet Food Institute and the Wine & Spirits Wholesalers of America.

Last week, the National Association of Manufacturers called for the federal government to designate manufacturing supply chains as “essential.” The National Retail Federation also asked Trump for national guidance for state and local governments to clarify which retail businesses and services are considered “essential.”