Kabul ? A new Afghan law makes it legal for men to rape their wives, human rights groups and some Afghan lawmakers said Thursday, accusing President Hamid Karzai of signing the legislation to bolster his re-election prospects.

Critics worry the legislation undermines hard-won rights for women enacted after the fall of the Taliban’s strict Islamist regime.

The law — which some lawmakers say was never debated in parliament — is intended to regulate family life inside Afghanistan’s Shiite community, which makes up about 20 percent of this country of 30 million people. The law does not affect Afghan Sunnis.

One of the most controversial articles stipulates the wife “is bound to preen for her husband as and when he desires.”

“As long as the husband is not traveling, he has the right to have sexual intercourse with his wife every fourth night,” Article 132 of the law says.