Montgomery County schools require a doctor's note for children to use sunscreen. Howard County requires a note from parents, and the lotion must be stored in the nurse's office. Anne Arundel students, by contrast, may carry and apply sunscreen with impunity. A bill pending in the Maryland legislature, however, would require school health officers to make sure students are allowed to wear sunscreen when they go outdoors on sunny days, a right that is not universally recognized in schools, according to cancer prevention advocates. ...Snip....Four school systems require a doctor's order for students to apply sunscreen. Eleven require at least...