Maat Tarot (Julie Cuccia-Watts, 2006) has quite a different perspective on many of the Majors.
In the case of the Emperor, instead of him being a rather distant figure on a throne, with symbols of authority in either hand, instead we meet a Green Man. Around him grows an abundance of grape-bearing vines, and he leans against a tree which seems to already have lost it's leaves, or else be dead. This symbolises the fact that this Green Man is in fact dying, transitioning into the Lord of Shadows as the days draw in after the Autumn Equinox. Still, he has a great deal of strength, wisdom, and an enduring connection with nature - helping manage the last of the harvest, the storage for winter, and the allocation of resources needed to husband them through the dark times. This is the aspect of rules and boundaries that may seem authoritarian, but is done for the best of everyone involved.
Rules and boundaries makes me think of my counselling clients. I have one who was a no-show this week, and if that happens again, the service suggests they try again at a later time. Another pushes quite a few of my buttons, so I have to be very firm and clear about what is my stuff and what isn't. My third client I forgot to tell last week that we're going to have a break at Easter - my bad! So, I need some of this Emperor energy to keep my on the straight and narrow today ;)
I am grateful for clear boundaries.