Barbers' shops in Iran have been ordered not to serve customers who wear ties or bow ties, Iranian press says.
Iranian police have warned barbers not to give men western hair styles or use make up on them.
Police say the shops risk closure if they break the rules.
The move is part of an unusually fierce crackdown on what is known locally as bad hijab, or un-Islamic clothing, that this year is also targeting men.
In the early days of the revolution wearing a tie was seen as a symbol of western decadence, but in recent years this has relaxed considerably.
Hair stylists have been warned that they could lose their licenses if they do not comply.
The latest directive is part of a campaign against westernised clothes, which has so far focused on women's headscarves and Islamic covering.
However, police have denied a report that they have ordered barbers not to serve customers wearing ties.
Etemad newspaper reports that the moral police sent a circular round to barbers' shops and hairdressers ordering them not to serve customers with ties or they could be closed temporarily or even lose their licenses.
Wild
'Bad hijab'
Police say that as well as avoiding western hairstyles and make up, barbers should not pluck customers' eyebrows.
The police also outlawed any kind of make-up for men, which is sometimes done for grooms on their wedding day.
Some young boys in Iran sport very wild hair styles , using gel to make their long hair stand on end in a fashion not seen in other countries.
Police say 95% barbers' shops do follow Islamic principals, but the rest should know the risks if they do break the rules.
Meanwhile newspapers in Iran have quoted the police as saying that 16,000 women and 500 men have been cautioned in the last week over their improper clothing.
Thousands of Iranian women have been cautioned
It is not clear if these figures are nationwide or only apply to the capital, Tehran.
The latest crackdown on poor Islamic clothing or "bad hijab" as it's known locally has seen men targeted for the first time in years.
Iranian television has said the crackdown on un-Islamic clothing has entered its second phase now where mobile police units will patrol Tehran to look for those who are not observing Islamic dress properly.
Some have been warned not to wear short-sleeved shirts while there are instances of boys with wild, spiky hairstyles forcibly having a stripe shaved down the middle of their head, so they have to go and have the rest removed afterwards.
According to the local media, Tehran's public prosecutor has suggested women who violate dress rules should be exiled from the capital to remote areas of the country.
Hundreds of Iranian women have been arrested in the last week for bad hijab.
A member of the parliament's legal committee has said there is no legal impediment to doing this.
Young women are kept for hours at night in a police station and complain they are insulted by the police, being told they are loose women.
The police even tried to arrest the Iranian wife of a diplomat who had to struggle to explain she had immunity.
One married woman in her forties going out for lunch said she was horrified to be told by a boy half her age not to cruise up and down in her car looking for men to pick up.
But one hardline newspaper has said the police should know they have the backing of God in their mission to enforce Islamic rules in society and all organs of power should support them.
