hahaha...just remembered, the term 'briefing strip' is a Jepp trademark!
Jepp Definition:
MANDATORY ALTITUDE — An altitude depicted on an instrument approach procedure chart requiring the aircraft to maintain altitude at the depicted value
All altitudes depicted in the profile view are MINIMUM altitudes unless specifically labeled otherwise.
All altitudes are above mean sea level in feet (AMSL).
5 — Maximum altitudes: may be abbreviated "MAX".
6 — Mandatory altitudes: abbreviations are not used.
7 — Recommended altitudes: abbreviations are not used