Withdrawal from a job offer before signing labour contract

I recently got a job offer through email from a semi-governmental company in Dubai which was labelled as indicative job offer as the subject.

I accepted the job offer through email providing all my educational documents and passport. This indicative offer through email is subject to approval by the government.

Attached documents included personal detail form, Non-declaration form and visa form. Nothing like a proper job offer letter or any document from MOL.

Is it binding for me or I can still reject? Will I be subjected to any employment ban if I reject now? Which document or stage will make me legally bound?