Sliema were crowned champions for the second successive season without playing - having a four-point lead over Birkirkara who have only one game to play against Sliema's two.
Alain Ekwe put Pietà ahead after 19 minutes with a delicate chip, but Lucian Dronca's 70th-minute penalty levelled matters after Anatole Debono had fouled Antoine Zahra.
Target reached for Aquilina
"We have reached our target once again," Sliema coach Edward Aquilina told uefa.com. "The secret of our success at Sliema? Well, harmony. We have a great bunch of players and administrators all united at one great club."
At the other end of the table, Msida St. Joseph FC beat Valletta FC 3-1 to set up a showdown in the final fixture of the season with fellow relegation contenders Balzan Youths FC. The match next Sunday will decide who will be relegated alongside Hamrun Spartans FC.
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