Section 69. The school committee shall provide for each schoolhouse under its control, which is not otherwise supplied, flags of the United States of silk or bunting not less than two feet long, such flags or bunting to be manufactured in the United States, and suitable apparatus for their display as hereinafter provided. A flag shall be displayed, weather permitting, on the school building or grounds on every school day and on every legal holiday or day proclaimed by the governor or the President of the United States for especial observance; provided, that on stormy school days, it shall be displayed inside the building. A flag shall be displayed in each assembly hall or other room in each such schoolhouse where the opening exercises on each school day are held. Each teacher at the commencement of the first class of each day in all grades in all public schools shall lead the class in a group recitation of the “Pledge of Allegiance to the Flag”. A flag shall be displayed in each classroom in each such schoolhouse. Failure for a period of five consecutive days by the principal or teacher in charge of a school equipped as aforesaid to display the flag as above required, or failure for a period of two consecutive weeks by a teacher to salute the flag and recite said pledge as aforesaid, or to cause the pupils under his charge so to do, shall be punished for every such period by a fine of not more than five dollars. Failure of the committee to equip a school as herein provided shall subject the members thereof to a like penalty.