The allegations of genocide and other violations of human rights that occurred during the 1971 Bangladesh Liberation War are complex and contentious. The specific actions taken by the parties involved as well as the relevant international legal frameworks determine the matter's legal status.
It is true that India, Pakistan, and Bangladesh signed the tri-party Delhi Agreement in 1973, which sought to resolve a number of conflict-related issues. The agreement stipulated, among other things, the recognition of Bangladesh as an independent nation, the return of displaced individuals, and the release and repatriation of prisoners of war. However, this agreement does not necessarily mean that Bangladesh cannot sue for alleged war crimes or other violations of international law.
In general, there are a few different options available for seeking justice for such crimes. The International Criminal Court (ICC), which has jurisdiction over a number of serious international crimes like genocide, war crimes, and crimes against humanity, is one option. However, it is important to note that the ICC generally only deals with crimes committed after its establishment in 2002. Consequently, it is unlikely that the ICC would have jurisdiction over 1971 events.
The International Court of Justice (ICJ), which has the authority to hear cases involving disputes between states and violations of international law, is another option. However, both parties must consent to the ICJ's jurisdiction before a case can be brought before it. Pakistan's willingness to submit to the ICJ's jurisdiction in this matter is unknown.
Last but not least, the alleged war crimes could be the subject of legal action in Bangladeshi or other national courts. However, depending on the jurisdiction and the particulars of the case, the legal mechanisms that can be used in these situations may differ significantly.
In a nutshell, the issue's legal status is nuanced, and a legal case's viability is contingent on a number of variables. It is ultimately up to the parties involved to decide whether or not to take legal action and how to do so in the most effective manner, despite the fact that there are some possible avenues for seeking justice in connection with the events of 1971.