Permanent Resident Card

Hi everyone,

I am a Algerian worker who has come to Belgium since 2015 to work on a permanent contract under work permit B as a consultant (Contract start date: 06/29/2015, date of first residence permit A: 08/17/2015).

I obtained my 5 work permits (the 5th is a single permit).
My employer has just applied for my 6th single permit.

Can I directly have an unlimited residence permit once the 6th occupation authorization is obtained? Or do I have to wait for the 6th residence permit A to be made to request an unlimited residence permit?

How should I proceed if it is possible to have an unlimited residence permit directly once my 6th occupation authorization is granted (expected to be obtained end of April for working period starting from June)?

Thank you in advance.
Best regards.