Iran will halt its voluntary implementation of the International Atomic Energy Agency (IAEA) additional protocol if other parties to the pact fail to fulfill their obligations under the document by February 21, Iranian foreign ministry spokesman Saeed Khatibzadeh said on Monday.

Khatibzadeh further stressed that Iran will continue to be a member of the the Non-Proliferation Treaty (NPT) and NPT safeguards.

Iran's decision is reversible if other parties adhere to their obligations, the spokesman said.

On February 21, an Iranian law obliges the government to end the sweeping inspection powers given to the United Nations (UN) nuclear watchdog under the 2015 nuclear deal and limiting inspections to declared nuclear sites only.

(With input from Reuters)