Samoa's Prime Minister, Tuilaepa Sailele, says the activities of international organisations must be transparent.
He was speaking after the Samoa-based regional environment organisation SPREP refused all comment about the sacking of two women who accused its director-general, Asterio Takesy, of harassment.
The two women - a Cook Islands-born New Zealander and a Samoan - allege that Mr Takesy claimed that under his diplomatic immunity, he could ask them to resign without stating a reason.
Tuilaepa says this is the normal excuse CEOs of international organisations use, but in this age of good governance it is important that their decision making is transparent.
"I have communicated my thoughts to the director that he should ensure that contractual terms of all the staff should incorporate very clear terms to ensure that the rights of the staff are protected."
