NOTE: Hopefully, this question will solicit solutions - from those that accept the presupposition - that :
"The Last Supper was Jesus and his disciples fulfilling the Mosaic/Jewish Passover Seder", (i.e., Messianic Jews, Jews for Jesus' "Christ in the Passover", etc).
In other contexts, Jesus justified breaking the Sabbath to meet the needs of others, (Matthew 12:1, Matthew 12:10, etc.).
But, if a widely held Christian tradition is correct - then Jesus egregiously violated Passover Sabbath requirements - If it is presupposed that the Last Supper was indeed a "Passover Seder, (Wikipedia)".
Regardless of which specific actions may have violated Passover and Sabbath ordinances - what are the possible justifications for Jesus to lead his disciples to disobey?
(See During the Passion - What laws might Jesus and his disciples been accused of breaking?, for possibilities.)
Note: The scope of this question is not intended to address the host of commands the rest of Israel, the Priests, and Pharisees, would be breaking too.
Acceptance Criteria: +1 for expert responses : "formally valid", relying on referenced facts - regardless if there is agreement. Will accept the strongest answer - regardless. (Please, this is NOT a debate!)