The hardline Islamist group has urged members to avoid "corrupt and illegal practices" regarding polygamy.
Analysts say the shake-up could be a sign of how seriously the Taliban are taking the most critical step in a deal Washington signed with the insurgents in February.
The Taliban's massive social media presence that's being ignored
Analysis: The United States has spent countless man hours working to counter Islamic State's online presence - but has neglected to do the same in Afghanistan, writes Austin Bodetti.