Trans men should compete in the male category as soon as they begin testosterone. Whilst it may take some time for them not to be disadvantaged in the male category, they will be almost immediately advantaged in the female category. So the male category is the most appropriate for equitable competition.
Prior to starting testosterone, they should be able to choose which category they wish to compete in. He will not be advantaged in the female category but may prefer to be disadvantaged in the male category.
When testosterone is being used, an application for therapeutic use exemption (TUE) must be made. If you don't understand why, have a look at the page on testosterone and drugs testing. Trans men will have regular blood test monitoring which will ensure their testosterone levels are within normal male range- you might ask their doctor to attest to this in the TUE application. Therefore they are not advantaged by being on testosterone and it is the only appropriate medication for them to take so TUE ought to be provided. WADA provide fuller information should you require it.
If you are setting out criteria for approving a TUE for a trans man then be sure to look into typical medical care provided in your country so you set appropriate requirements. For example, in the UK it's rare for a trans man to see an endocrinologist so requiring evidence from one wouldn't be appropriate.
Prior to starting testosterone, they should be able to choose which category they wish to compete in. He will not be advantaged in the female category but may prefer to be disadvantaged in the male category.
When testosterone is being used, an application for therapeutic use exemption (TUE) must be made. If you don't understand why, have a look at the page on testosterone and drugs testing. Trans men will have regular blood test monitoring which will ensure their testosterone levels are within normal male range- you might ask their doctor to attest to this in the TUE application. Therefore they are not advantaged by being on testosterone and it is the only appropriate medication for them to take so TUE ought to be provided. WADA provide fuller information should you require it.
If you are setting out criteria for approving a TUE for a trans man then be sure to look into typical medical care provided in your country so you set appropriate requirements. For example, in the UK it's rare for a trans man to see an endocrinologist so requiring evidence from one wouldn't be appropriate.