These are the rules and I know the fruit sellers don’t play by these.
https://www.montgomerycountymd.gov/HHS/LandR/FoodServiceFacility.html
Any person planning to distribute, prepare, handle, or dispense food for public consumption with or without charge must apply for a Food Service Facility License.
A license must be obtained prior to opening a business. Licenses expire on January 31st and must be renewed each year. A Use and Occupancy Permit must be obtained through the Department of Permitting Services at 240-777-6200. Many businesses also are required to have a Trader’s License. To determine if you need a Trader’s License, contact the Montgomery County Circuit Court, Business Licenses Office at 240-777-9460.
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"Montgomery County Code 15-8(b)(2) states a licensee must not operate a food service facility unless the facility is under the immediate control of a Certified Food Service Manager."
How do I become a Certified Food Service Manager?
Anyone may be certified as an Food Service Manager. The applicant must successfully complete an approved Food Service Manager's course, and file an application with Licensure and Regulatory Services to receive a Certified Food Service Manager’s photo identification card. The course may be taken on-line or in a classroom. The exam must be taken at a proctored location. Online test certificates will not be accepted. The card is valid for three years from the initial completion date of the approved course.
The applicant must come to the Department of Health and Human Services, Licensure and Regulatory Services office (2425 Reedie Drive, 9th floor, Wheaton, MD) to obtain a photo identification card. Office hours for photo identification cards are Monday-Friday from 8 a.m. to noon. Call 240-777-3986 for more information.
Certified Food Service Manager Fact Sheet
ANSI Certified Food Service Manager Course
Complete and return the Certified Food Service Manager License Application
To determine the appropriate fee, please see the Fee Schedule