ADELAIDE, AUSTRALIA - JUNE 11: Hamish Hartlett of the Power runs with the ball during the round 12 AFL match between the Port Adelaide Power and the Western Bulldogs at Adelaide Oval on June 11, 2016 in Adelaide, Australia. (Photo by Morne de Klerk/Getty Images)

Port Adelaide has been hit with a $20,000 fine for not following AFL concussion regulations when assessing Hamish Hartlett last weekend.

Hartlett passed his concussion test after a head knock last Thursday night against Hawthorn, however, he did not remain off the ground for the minimum 15-minute period to ensure the club doctor assessed the vision of the incident.

The 25-year returned to the field after just five minutes, with the Power not informing the league’s interchange official that Hartlett was undertaking a concussion test, which is required under AFL rules.

As a result the league has fined the club $20,000, with half of the fine suspended until the end of 2018.