Mangala Samaraweera in his statement accused Rajapaksa of going back on an agreement he had with the UN soon after the war with the LTTE ended in 2009.
"This was also evident when he and UN Secretary-General Ban Ki-moon agreed to an accountability process in their 2009 Joint Communique, which was later made into a formal commitment to the international community," Samaraweera said.
Rajapaksa had claimed that the current government was betraying the country's security forces through the legislation on the Office of Missing Persons (OMP) to probe the cases of missing people.
The OMP is a truth-seeking investigative agency and it does not make judgements on disputes, he said.
In fact, the legislation states that "the findings of the OMP shall not give rise to any criminal or civil liability," he said.
Its primary function is to establish whether a missing person is dead or alive and, if they are dead, discover when, how and where they died. The OMP will require technical expertise that is not available in Sri Lanka, Samaraweera argued.
The purpose of having an exclusion of the Right of Information Act is to ensure that those who know the fate of missing or disappeared persons can transmit that information without fear.
The OMP is a mechanism designed to discover the truth of a missing person's fate and not act as a prosecutorial or judicial body, he said.
