Actually the way to understand this is to obey all the Roman Pontiffs whether living or deceased.
Which supports the logic that they are all united in truth to the invisible head, Jesus Christ our Lord and Savior.
(Unless, that is, your objective is to mock the Church by laughing off her laws assuming them to be impractical, and so, without giving it even a thought.)
I wouldn't say impractical would be the word I would choose in this sentence. Unnecessary and man made would be more appropriate. Her laws (RCC that is) are not Gods laws. If you wish to follow a man (and all Roman pontiffs are just that) then submit to them. Follow them as you would the pied-piper. Jesus is the only One a person needs to follow. And He didn't wear silky robes with a big pointy hat in a walled palace. And He didn't kiss a Koran either.