Tardy:
A student is considered TARDY if he/she is not in line at morning assembly when the school bell rings at 7:50 a.m. Teachers will record daily attendance before morning prayer. Students must check in with the office and get a tardy slip if they arrive after morning assembly or when attendance has been taken in classes on Mass days. Tardiness is recorded daily by teachers at 7:50 am and then recorded on Gradelink on a student’s official attendance register, which is a legal document.
http://handbook.la-archdiocese.org/chapter-13/section-13-2