Lutherans and the UMC - Gay Clergy and Full Communion

I just read the following article: Lutherans to Allow Sexually Active Gays as Clergy.

In addition, the ELCA Adopts Full Communion Agreement with the United Methodist Church.

I am not sure how these are going to co-exist. According to the above article, "Full communion makes possible a variety of joint ministries, sharing of resources and interchangeability of clergy."

How will clergy be interchangeable among the denominations if there is disagreement about whether a self-avowed, practicing homosexual can serve as a clergy person?