All senior presidential secretaries were without jackets Monday when they attended a weekly meeting with President Lee Myung-bak under a dress code adopted in line with a government campaign to save energy, officials said.

Lee was also without a jacket during the meeting, said presidential spokesman Park Jeong-ha.

Last week, the home affairs ministry instructed public officials to dress as they want without sticking to suits as part of a campaign to save electricity in the hot summer weather. Under the electricity saving campaign, government offices are required to keep indoor temperatures at 28 C or above.

Officials said that no jacket will also be a dress code for Cabinet meetings.

Electricity supply has been a concern in South Korea after unseasonably high temperatures in September last year caused massive power outages that affected more than 6 million homes across South Korea.

The Seoul municipal government also announced similar measures that will allow employees to wear light clothing instead of suits from May through September.

The campaign, dubbed "Coolbiz," will even permit shorts and sandals during the hottest months of June through August.

The city government said it plans to mark World Environment Day on June 5 with a "Coolbiz" fashion show that will cast Seoul Mayor Park Won-soon as a model. (Yonhap)