The Church has announced exceptions to the dress standards for young men serving as missionaries. Under the updated guidelines, the standard missionary attire is reemphasized, which includes a white shirt and tie and, in some areas, a suit coat.
In approved teaching areas, elders may be able to wear a white or plain blue dress shirt with or without a tie. These exceptions will be determined by Area Presidencies. Missionaries will be notified by their mission president if these exceptions apply to their teaching area.
Read more in the article “Exceptions to Dress Standards Announced for Young Male Missionaries” on the Church’s Newsroom.