The Democratic Republic of Congo's senate unanimously approved a referendum law on Saturday that could allow President Felix Tshisekedi to seek a third term in office.

"Of the 78 senators who took part in the vote, 78 voted in favour of the bill, no votes against or abstentions were recorded," Senate President Jean-Michel Sama said.

The draft legislation would now be sent to the president for promulgation after the National Assembly approved it days earlier.

Once enacted, the law would allow the president to amend the constitution through a constituent assembly followed by a referendum in the event of a "major dysfunction" of state institutions.

Under current constitution, president serves a maximum of two terms

The bill was first passed by parliament in June, where Tshisekedi's ruling coalition holds a majority.

However, it was sent back for revision after the Constitutional Court raised concerns about provisions that would have allowed the president to call a referendum on any issue deemed of fundamental importance.

The court demanded that lawmakers clearly define the conditions under which a referendum could be organised.

Under the current constitution, the president is limited to two five-year terms.

Tshisekedi open to third term

Tshisekedi, whose second and final term is due to expire in 2028, said earlier this year that he would accept another mandate if requested by the Congolese people.

His remarks drew criticism from opposition groups concerned that the proposed constitutional changes could pave the way for him to remain in power beyond the current limit.