NACC Secretary-General Sansern Poljiak said the agency agreed on the requirement when it met today.
He said NLA members must declare their assets and liabilities within 30 days of their August 8 swearing-in.
The deadline is September 7 and the Anti-Corruption Commission will publicize the declarations in the 30 following days, he said.
Mr Sansern reasoned that the 2007 Constitution requires members of the House of Representatives and Senate to disclose their assets and liabilities and the 2014 provisional constitution requires NLA members to work like representatives and senators.
He said that the National Legislative Assembly does not ban its members from holding more than a 5 per cent share in a concessionaire of the state because it was formed swiftly.
The NACC law bans such substantial holdings.