In Ann Brashares' book-series-turned-movie-series "The Sisterhood Of The Traveling Pants," four best friends -- Bridget Vreeland (Blake Lively), Carmen Lowell (America Ferrera), Tibby Rollins (Amber Tamblyn) and Lena Kaligaris (Alexis Bledel) -- established a strict set of rules after finding a pair of jeans that magically fit every single one of them. These girls cherished the Pants, and the rules that governed its use were basically the law.

Tamblyn and Ferrera recently confirmed that a third "Sisterhood" movie is officially in the works. To celebrate this glorious news, we decided to take a look back at the original list of rules set forth by the Sisterhood in the series' first novel -- and they're tad outdated and/or unrealistic in today's world.

Here's how the Sisterhood's sacred rules would likely play out IRL ( = in real life):

RULE: You must never wash the Pants.

IRL: After four years of consistent wear without a single drop of soap, that denim absolutely reeks. At least Febreze those suckers every once in awhile.

RULE: You must never double-cuff the Pants. It's tacky. There will never be a time when this will not be tacky.

IRL: The Sisterhood was wrong. The time is now. Thanks to the revival of '90s normcore, rolling up your pants is cool again. Cuff away, baby.

RULE: You must never say the word "phat" while wearing the Pants. You must also never think to yourself "I am fat" while wearing the Pants.

IRL: Nobody spells "fat" with a "ph" anymore. And a pair of jeans, no matter how magical they are, can't prevent negative thoughts from entering your head. Also, what if you wear the Pants to Thanksgiving dinner and you have to unbutton the first button after your second slice of pie?

RULE: You must never let a boy take off the Pants (although you may take them off yourself in his presence).

IRL: OK, this is a good rule in theory, but the execution needs some work. Think about it -- you're in the moment, he makes a move and you say, "Wait! I need to take these off myself." Not weird at all.

RULE: You must not pick your nose while wearing the Pants. You may, however, scratch casually at your nostril while really kind of picking.

IRL: If nobody's looking, you're going for it. Pants aren't going to stop you from digging for gold when you can feel the boogers taking over your nose and there are no tissues in sight.

RULE: Upon our reunion, you must follow the proper procedure for documenting your time in the Pants. On the left leg of the Pants, write the most exciting place you have been while wearing the Pants. On the right leg of the Pants, write the most important thing that has happened to you while wearing the Pants. (For example, "I hooked up with my second cousin, Ivan, while wearing the Traveling Pants.")

IRL: The most exciting thing you did in the Pants was finish the fifth season of "Gilmore Girls" on Netflix. You'd rather not permanently document this awe-inspiring achievement on jeans that will never be properly washed.

RULE: You must write to your Sisters throughout the summer, no matter how much fun you are having without them.

IRL: Daily Snapchats keep everyone in the loop 24/7. Even when they don't want to be.

RULE: You must pass the Pants along to your Sisters according to the specifications set down by the Sisterhood. Failure to comply will result in a severe spanking upon our reunion.

IRL: Even when you inevitably you slip up and mail the Pants a few days late, no one's actually going to spank you. That's just way too creepy.

RULE: You must not wear the Pants with a tucked in shirt and belt. See rule #2.

IRL: You have a summer internship and need to tuck in your shirt. Also, your belt matches your shoes so that makes it OK.

RULE: Remember: Pants = Love. Love your pals. Love yourself.

IRL: Remember: Pants = Love. Love your pals. Love yourself. (Some things never change.)