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spec: These facilities are attached to the hospitals or child health clinics , some of which are very far away from the patients ' dwellings . There exists a broad base of support for school feeding programs from nonpoor groups including low - and middle-income families who may receive subsidized meals and farmers whose surplus commodities are used in the program . The signer of a document is not required to include any key information , a key name , X.509 certificate , a PGP Key Identifier etc. Alternatively , a link may be provided to a location where the full Key Information may be found . The keyboard tells the system when the appropriate key is pressed to enable or disable one of these modes , and the system controls the LED 's status in response .