"We have to think of ways to escape this (resolution). We will tell the government to call an all party meeting and give a time frame to implement the LLRC recommendations," Ranil Wickremesinghe, the main opposition leader told reporters.
Wickremesinghe said the action plan to implement the Lessons Learnt and Reconciliation Commission (LLRC) must be announced before May 31.
"We must have a mechanism to do that. The government alone cannot do that", he said. The opposition leader added that Rajapaksa administration's bungling had led to the situation of international resolutions against the country.
US adopted a similar resolution last year with India's support which bound Sri Lanka to make rapid progress on reconciliation with the Tamils.
Contesting reported deaths of 40,000 civilians during the war with the LTTE as unverified, Sri Lanka has said it was in the process of ground verification of facts in the former battle zones to ascertain the real numbers.