(UP-NPMCC) showed that the improper conversion of taxis could expose cabdrivers and passengers to ALPG.
Janairo said overexposure to ALPG could lead to "unconsciousness and even death."
"It is important that installations should be done only by an ALPG installer approved by the Department of Trade and Industry to ensure that the setup is correctly done," Janairo said in a statement.
"Only by introducing regulations and standards to ensure the safe use of ALPG can we ensure the health and safety not only of drivers but also passengers," he added.
Janairo said the study covered 26 ALPG and 13 conventional-vehicle male drivers who were randomly selected from a list of users of auto LPG-powered vehicles and users of conventional vehicles (diesel and gasoline).
The study covered 53 taxis: 28 ALPG taxis, and 25 gasoline or diesel taxis, he added.
ALPG is cleaner than conventional automotive fuels.
We have a range of our professionals in the calendar from touring professionals to teaching pros," The NZPA quoted Warren Sevil, chief executive of the ALPG, as saying.
He added: "The aim is to depict a new, fresh image and is all part of our rebranding of the ALPG to help change perceptions of women's golf."
Sevil said that the ALPG's Calendar Girls were not just pretty faces, and that he was hopeful that many of the ladies would will make it to the top of the leaderboard.