One legal person, two sets of books
Legally, the branch and the parent are one entity. In accounting terms, the branch keeps a self-contained ledger with its own assets, liabilities, income and costs, and a head office account that replaces share capital. Money sent from the parent to fund the branch is credited to head office; profit sent back is debited.
At group level, the branch ledger is combined with the parent’s and the head office account cancels against the parent’s investment in the branch. Locally, the branch ledger is what UAE authorities and auditors look at.