The construction "verb-A QOL-", i.e. the present gerund followed by the auxiliary verb qol- (root meaning: 'to stay'),
expresses permission as a favour from the speaker, meaning good will towards the addressee as well as wishes for the completion of the action.
When the permission is granted to the addressee, the auxiliary verb is used with the imperative form.
Mayli, siz bir ming ikki yuz so'm bera qoling.
OK, you may pay 1200 sum.
Ochiq ayta qoling.
Go ahead and say it straight.
OK, you may leave!
Puling bo'lmasa, birovdan qarz ola qol.
If you have no money, borrow from someone.
When the speaker gives the permission to himself, the auxiliary verb is used with the suffixe -AY for the optative.
Well, so I may leave then?
When the speaker gives the permission to a third person, the auxiliary verb is used with the suffix -SIN for the optative-jussive-permissive.
Let him come.