The new regulations, which were approved by the Assembly government this week, will come into effect from September.
From next term, NQTs will be able to work as short-term supply teachers for five years after gaining qualified teacher status, in order to give them sufficient time to find a permanent position in which to undertake their induction period. Local authorities will also be given the discretion to rule that two consecutive half-terms count as a full term for induction.
Heledd Hayes, education officer for the National Union of Teachers Cymru, said: "This puts a little less pressure on people who qualify but can't get a job. It's good for the morale.
"But I would like to see the Assembly go further and guarantee an induction post for all teachers. A lot of money is spent training these teachers, and we don't want to lose their expertise."
Induction became a statutory requirement for all new teachers in Wales in September 2003.