Gay relationships, abortions and artificial insemination are some of the actions the Archdiocese of Cincinnati is specifically banning in its teacher contract for next year.
Previous contracts required teachers to comply with the Roman Catholic Church's philosophy but the new contract for the first time cites specific examples of forbidden behavior.
The archdiocese says the examples were added partly in response to problems including lawsuits that have arisen over violations of Catholic doctrine. But critics say it infringes on employee rights in part because it also bars them from publicly supporting causes the church opposes.
The contract would affect more than 2,000 teachers in the archdiocese.
The National Association of Catholic School Teachers says it knows of no other archdiocese that has instituted the kind of language planned in Cincinnati.