Tiger Airways Australia must continue to meet several conditions imposed by the country's regulators if it is to continue with its services.
The Australia's Civil Aviation Safety Authority (CASA) lifted the suspension of the airline's domestic services on Wednesday and restored its air operator's certificate (AOC), allowing the carrier to resume its operations on 12 August - more than a month after it was grounded.
"Tiger Airways Australia was required to demonstrate it had complied with the necessary safety requirements before it was permitted to resume operations, CASA said.
"These requirements included additional simulator and ground training for Tiger's pilots," CASA added.
However, CASA said it has imposed a fresh set of conditions that Tiger must follow if it wants to keep its AOC.
"These conditions address key areas of operational importance within Tiger Airways and will underpin ongoing improvements in the airline's safety performance," CASA said.
The conditions pertain to pilot training and proficiency, pilot rostering and fatigue management, and the currency and revision of operational manuals and related documents.
They also include improved change-management processes, the appointment of additional qualified personnel in key positions, and amendments to the airline's safety management system, the regulatory body said.
In addition, Tiger is limited to flying only a maximum of 18 sectors a day in August. This will be increased only upon CASA's approval.
"CASA will be closely monitoring the operations of Tiger Airways through scheduled surveillance and regular spot checks." the agency said.
"We will also be meeting regularly with the airline to review ongoing safety performance and compliance with the conditions on the airline's operations," the agency added.