PAS' elected representatives are tied to a religious oath if they quit the party, said PAS Youth chief Nik Mohamad Abduh Nik Abdul Aziz.
His comments in a Facebook posting came amid the possibility that several PAS elected representatives may be sacked as they plan to set up a new political party to replace PAS in the opposition coalition.
"This Bai'ah (religious oath) cannot be violated. They have taken from PAS, they have not given to PAS.
"If they go against it, they must return what they have taken from PAS.
"The rest is between them and Allah," said Nik Abduh in reference to the elected representatives winning their seats under the PAS banner.
Bai'ah PASBai'ah dalam PAS ada dua:1) Bai'ah ahli PAS kepada PAS. Ia bermaksud ahli MEMBERI kesetiaan mereka...
Posted by Nik Mohamad Abduh on Tuesday, 21 July 2015
The PAS progressive leaders, who were ousted from the party leadership by the conservative faction in June, has set up Gerakan Harapan Baru as a prelude to the new party.
Nik Abduh said this oath for PAS elected representatives differed from the regular pledge of loyalty to PAS, which can be withdrawn when a regular member quits the party.
He challenged them to find any fatwa which would allow them to break their religious oath.
After the 2008 general election, when the opposition coalition was plagued by defections, it was revealed that some PAS representatives had made a religious oath where they would have to quit as elected representatives if they are sacked from PAS.
The religious oath also said they have to divorce their wife if they were to willingly quit the party or defect to another party.
However, it is unclear if these terms were retained in a new religious oath taken for the 2013 general election.