The United States Air Force has authorized the use of gender pronouns in electronic signature boxes for communications within the department.

"This guidance provides approval for the use of pronouns in electronic signature blocks and expands on written communication by providing official templates posted on e-publishing website available for download," the Air Force correspondence dated December 9 states.

FILE - This Friday, Aug. 10, 2007, file photo, shows the logo of the Department of the U.S. Air Force at the United Staes embassy, in Berlin. (AP Photo/Michael Sohn, File)

FILE - This Friday, Aug. 10, 2007, file photo, shows the logo of the Department of the U.S. Air Force at the United Staes embassy, in Berlin. (AP Photo/Michael Sohn, File)

YOGA STUDIES COLLEGE PROFESSOR ORDERS STUDENTS TO USE GENDER PRONOUNS ON ASSIGNMENTS OR GRADES TAKE A HIT

"The use of pronouns (he/him, she/her, or they/them) in an email signature block is authorized but not required," the memo adds.

The Air Force did not immediately respond to a request for comment from Fox News.

U.S. Air Force 44th and 67th Fighter Squadron F-15 Eagles and 961st Airborne Air Control Squadron E-3 Sentries taxi down the runway during a no-notice exercise April 12, 2017, at Kadena Air Base, Japan. The elephant walk showcased Team Kadena's ability to quickly generate combat air power in the event of an attack on Okinawa. Operating from the largest U.S. military installation in the Indo-Asia-Pacific region, the 18th Wing defends U.S. and Japanese mutual interests by providing a forward power projection platform with fully integrated, deployable combat power. (U.S. Air Force photo by Senior Airman John Linzmeier)

U.S. Air Force 44th and 67th Fighter Squadron F-15 Eagles and 961st Airborne Air Control Squadron E-3 Sentries taxi down the runway. (U.S. Air Force/Senior Airman John Linzmeier)

STATE DEPARTMENT RIDICULED OVER CELEBRATING 'INTERNATIONAL PRONOUNS DAY' AMID GLOBAL CRISES

College campuses and workplaces across the country have been adopting the "gender neutral" pronouns in an effort to be more politically correct when addressing people who don't wish to identify with a single gender or wish to be identified by a gender different from their biological sex. 

The State Department was criticized earlier this year for openly celebrating International Pronouns Day given the challenges it faces around the world.

FILE PHOTO: The Pentagon building is seen in Arlington, Virginia, U.S. October 9, 2020. REUTERS/Carlos Barria/File Photo

FILE PHOTO: The Pentagon building is seen in Arlington, Virginia, U.S. October 9, 2020. REUTERS/Carlos Barria/File Photo (REUTERS/Carlos Barria/File Photo)

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"Today on International Pronouns Day, we share why many people list pronouns on their email and social media profiles," the department tweeted.