Question about La Ropa Beach

Hotels like the Catalina & Viceroy pay SEMARNAT (the QUANGO that administers the "concession beaches"- in Mexico), a fee for the use of a portion of public beach (a Concession) which gives them the SOLE right to sell food and beverages on that area. ANY member of the public may use these areas - but may not bring food, drink, or saleable items which the concessionaire my sell. There are set regulations to the concessions -such as the concessionaire must not put permanent structures on the concession and they cannot fence off the area, or offer exclusivity.