Do we start ATT and ART simultaneously if CD 4 count less then 50 in a HIV patient with TB?

Do we start ATT and ART simultaneously if CD 4 count less then 50 in a HIV patient with TB ?

First ATT then ART because if ART is given before it will lead to reconstitution of immune system and more agressive manifestation of TB

I know that ,is there a exception to that

First ATT to prevent immune reconstitution.following 2weeks of ATT,then ART

No the ATT first then ART only for CD4 counts >50

<50 simultaneously as per marrow