Putting an exhibit mark on a document:

Disentitles either party to the suit from contending that the document is not to be read into evidence

Disentitles either party from contending at the stage of final arguments that the document should not be read into evidence unless such party had at the time of putting of exhibit mark raised objection to its admission into evidence and such objection was kept open for decision

Is final as far as the Suit Court is concerned, of admission of the document into evidence