HONG KONG — When Brunei announced in 2013 that it was bringing in harsh Islamic laws that included punishments of death by stoning for adultery and gay sex, the move was met with international protest. Some investments by the country’s sovereign wealth fund, including the Beverly Hills Hotel, were targets of boycotts and calls for divestment.

Following the outcry, Brunei, a sultanate of about 430,000 on the island of Borneo, delayed carrying out the harshest provisions of its Shariah law.

Now, it is quietly going ahead with them.

Beginning on April 3, statutes allowing stoning and amputation will go into effect, according to an announcement posted by the country’s attorney general last year that has only recently received notice.

That has set off a renewed outcry from human rights groups.

“Brunei’s Penal Code is a deeply flawed piece of legislation containing a range of provisions that violate human rights,” Rachel Chhoa-Howard, a researcher for Amnesty International, said in a statement. “As well as imposing cruel, inhuman and degrading punishments, it blatantly restricts the rights to freedom of expression, religion and belief, and codifies discrimination against women and girls.”