All adult residents born in the Cetina region who have love and affection for their homeland and place of origin, who enjoy social reputation among the people, and are willing to promote the goals of the Society, may become members of the Alka Knights Society.
The Cetina region, as the old Alka region, covers the area confined by these villages: Zelovo, Potravlje, Maljkovo, Laktac, Bitelić, Bajagić, Gljev, Korita, Otok, Voštane, Kamensko, Tijarica, Budimiri, Nova Sela, Bisko, Ercegovci, Dicmo, Osoje, Sušci, Lučane and Zelovo.