YANGON, Burma (AP) — Authorities in Burma have told opposition leader Aung San Suu Kyi that she must refer to the Southeast Asian nation by its official name Myanmar, and not “Burma.”

Aung San Suu Kyi

Aung San Suu Kyi. Pic: AP.

The country’s former military rulers changed the nation’s name in English from Burma to Myanmar in 1989, but opponents and exile groups have persisted in referring to the country as Burma as a sign of protest and defiance.

(READ MORE: What’s in a name – Burma or Myanmar?)

Burma’s election commission issued the complaint in the state-run New Light of Myanmar newspaper on Friday, saying Suu Kyi had referred to the country as Burma during her landmark trips to Thailand and Europe.

The commission supervises laws dealing with political parties.

(READ MORE: The hypocrisy of Burma’s pro-democracy movement)

Suu Kyi became a lawmaker after her party won dozens of parliament seats in April.