Egypt's ruling military council has issued an amended constitutional declaration, Egypt's state television reported on Sunday, as polls in the country's key presidential run-off closed.

Citing a military source, state television announced the issuance of the document, which is expected to hand the council legislative power and budgetary oversight after a court ruling declared the elected parliament invalid.

The new document was not immediately available, but a military source earlier described elements of it to AFP, saying article 56 would be amended to give legislative powers and the state budget to the Supreme Council of the Armed Forces that took control of the country after Egypt's 2011 uprising.

SCAF had in January handed legislative power to parliament, but on Thursday Egypt's constitutional court effectively annulled the body, ruling that a third of its members had been elected illegally.

The amended document, which replaces an original document issued in March 2011, is also expected to include a new version of article 60, which deals with the formation of the constituent assembly that will draft Egypt's permanent constitution.

A new panel was recently picked by the parliament following its earlier dissolution amid accusations of an Islamist monopoly.

Article 30 of the declaration will also be amended to say that the new president will be sworn in before the Supreme Constitutional Court instead of by the lower house of parliament, the source told AFP.

Full details of the amended declaration are to be announced at a military press conference on Monday, state television said.

Egypt's Freedom and Justice Party, the political wing of the Muslim Brotherhood, has rejected the constitutional court ruling ordering parliament dissolved.

Parliamentary speaker Saad al-Katatni, an FJP member, said on Sunday he had told members of the ruling military council he rejected any attempt to retake legislative power on the basis of the court ruling or a new constitutional document.