Is incendiary ammo legal?

Is incendiary ammo legal? Incendiary Munitions and the Laws and Customs of War on Land Incendiaries, to include napalm, flame-throwers, tracer rounds, and white phosphorous, are not illegal per se or illegal by treaty.

Incendiary Munitions and the Laws and Customs of War on Land

Incendiaries, to include napalm, flame-throwers, tracer rounds, and white phosphorous, are not illegal per se or illegal by treaty.