Gar imuhal ixutar i ikecmen deg uslugen n teqbaylit llan wid id d-yewwin ɣef tutlayt (Tajeṛṛumt-Asegzawal-amawal) akked ɣef tsekla (tamacahut- tullist- tamedyazttimseɛraq- inzan). Ad neɛreḍ ad nissin tajeṛṛumt n tutlayt-agi, ad d-nejmaɛ daɣen iḍrisen n tsekla taqbaylit, tinilbit (précurseurs) n usjerrum n teqbaylit ufan-d d akken tutlayt-agi 18