Mr Pornpetch serves as a legal adviser to the National Council for Peace and Order which seized administrative power on May 22. No other contestants were in competition for the post.
There was no need for Mr Pornpetch to explain his vision as there was no competitor contesting the post.
Assembly members later elected Surachai Liengboonlertchai, a former Senate Speaker, as first vice-president and Peerasak Porjit, as second vice-president.
Again, no other contestants the candidates for the two posts.
Mr Surachai later thanked the NLA members and told them that he would perform his duty by adhering to His Royal Highness Crown Prince Maha Vajiralongkorn’s advice given during the Assembly's opening yesterday.
In his speech, HRH Crown Prince Maha Vajiralongkorn stressed the need for Assembly members to be scrupulous in carrying out their duties for the sake of the country.
He said that the assembly holding its first session heralds a good start for all members to work on drafting the new permanent constitution and legislation to restore democracy, national stability and security.
He said assembly members should realise the importance of their duties and be fully committed to working together and completing their duties scrupulously, correctly and quickly for the sake of the nation and public interest.