The Doctor's rules

From Tardis Wiki, the free Doctor Who reference

The Doctor's rules were a series of guidelines created by the Doctor for their companions. The Thirteenth Doctor admitted that her rules changed all the time, and noted that she found it especially important to lay down the rules with new companions. (TV: The Battle of Ranskoor Av Kolos)

As Jackson Lake, when he believed himself the Doctor, told his companion, Rosita:

The Doctor's companion does what the Doctor says.   Jackson Lake [The Next Doctor [src]]

The Fourth Doctor's rules

The Seventh Doctor's rules

The Ninth Doctor's rules

The Tenth Doctor's rules

The Eleventh Doctor's rules

The Twelfth Doctor's rules

The Thirteenth Doctor's rules