Mr Chuchart, in his capacity as chairman of the Ministry's Civil Service Committee, said the 2007 Exoneration Act had not been raised for discussion during a recent meeting of the committee.
"The committee did not consider the 2007 Act [in connection with Mr Yongyuth's status]. This story is unfounded. I am not aware of it," he said. "What I know is that it [the committee] has expelled a former [interior] permanent secretary. "
The deputy minister was responding to a motion raised by Democrat Party list-MP Ong-art Khampaibul during a parliamentary meeting yesterday.
Mr Chuchart said whatever resolution was reached at the meeting on Mr Yongyuth's case, he just endorsed it.
Mr Yongyuth is facing mounting pressure to resign as minister and Pheu Thai Party leader after the National Anti-Corruption Commission (NACC) found him guilty of malfeasance.
The NACC says Mr Yongyuth acted unlawfully in his handling of the controversial Alpine land case while the then deputy permanent secretary for the interior was serving as acting permanent secretary in 2002.
The ministry's committee decided to expel Mr Yongyuth, with the expulsion order retroactively taking effect from Sept 30, 2002.
However, the committee has reportedly claimed that the expulsion is also retroactively overruled by the 2007 Act.
Interior permanent secretary Phranai Suwannarat, as deputy chairman of the ministry's Civil Service Committee, said the committee has notified the Civil Service Commission about Mr Yongyuth's expulsion.
Election Commission (EC) chairman Apichart Sukhagganond said the EC would check first if it was authorised to consider Mr Yongyuth's status.
If so, it would decide on the matter as soon as possible.
After ruling on the case, the EC would forward its decision to the Constitution Court, said the EC chairman.
Paijit Srivorakhan, a member of Pheu Thai's legal team, conceded the Yongyuth wrangle could lead to the party being dissolved as Mr Yongyuth serves as its leader.
Red-shirt co-leader Jatuporn Prompan yesterday said he did not know a Surin red shirts' group which has pressed Mr Yongyuth to resign as party leader. The group, led by Mr Theppanom Namlee, has petitioned the EC to rule on Mr Yongyuth's status.
Yesterday, the Pheu Thai Party also asked the EC to rule on Mr Yongyuth's eligibility to hold political office.
Another red-shirt co-leader and Pheu Thai list-MP Korkaew Pikulthong admitted there was internal pressure for Mr Yongyuth to step down. Many people are vying for the minister's post.