Replying to Switch Lip?

So recently, my friends and I have perfected the art of switch onto rails. The only debate is which side is "switch lip". There are two options below, please reply with a number, 1 or 2 thanks!

1. Is "switch lip" having your back tails cross over the rail first? Therefore, you do not have to lift up the front of your skis to mount.

2. Is "switch lip" having you pop the front of your ski up and onto the rail in order to land on it safely.