By Emily Smith, CNN

(CNN) - The U.S. Air Force Academy has decided to make phrase "so help me God" optional in its honor code after an activist group protested that requiring all cadets to recite it violates their rights.

The complete oath reads: "We will not lie, steal, or cheat, nor tolerate among us anyone who does, so help me God."

Cadets are required to recite the oath when they complete basic training. It is also taken by the entire cadet wing each year as re-affirmation of their commitment to the honor code, said AFA spokesman Major Brus Vidal.

The Military for Religious Freedom Foundation, a watchdog group that has waged repeated battle with the armed services, took issue with the last clause of the sentence, saying that no cadets should be forced to make a promise to God.

After the complaint was filed by MRFF, the Air Force Academy Honor Review Committee met for an in-depth discussion regarding the oath.

On Friday, the AFA released a statement saying they had decided to make the final clause of the honor oath optional.

The AFA statement read, in part, “Here at the Academy, we world to build a culture of dignity and respect, and that respect includes the ability of our cadets, Airmen and civilian Airmen to freely practice and exercise their religious preference –- or not.”

"The fact that the oath is optional will be communicated in honor lessons, leadership lessons, and religious respect lessons during the summer (cadet basic military training) so all trainees will understand prior to taking the Cadet Honor Oath that the final clause will be completely optional," said Vidal.

"The person administering the oath, who is the cadet wing honor chair has the option to say or not say 'so help me god," so this might vary from year to year," Vidal continued.

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Mikey Weinstein, MRFF's founder and president, said he would sue the academy on behalf of his clients if the words were still left at the end of the oath, even if repeating them was optional.

“If the words are still there and you don’t say [them] you turn yourself into a tarantula on a wedding cake,” he said.

MRFF has taken issue with the Air Force before. In 2011, the group complained about an Air Force training presentation that used religion to teach the ethics and morality of using nuclear weapons.

That same year, CNN learned that the Air Force was using religious tenets such as the Ten Commandments to teach core values to ROTC cadets.

MORE ON CNN: Air Force's use of Christian messages extends to ROTC