Do you tuck a white shirt under a blazer?

Cassie

I'm going to this job development/state competition thingy and dress code is black professional shoes (heels or flats for girls), black slacks (or pencil skirts to the knee for girls; can wear black or nude colored pantyhose), white shirt (preferably a solid button up), and black blazer.

Am I supposed to tuck the white shirts under the skirt so it's barely visible under the blazer or no?