In over forty countries Jehovahs Witnesses carry out their work under official ban or restrictions , so that it is not wise to include a number of these by name in the detailed report .. This sentence is hard to understand. A simpler version with equivalent meaning is the following:
Jehovah's Witnesses carry out their work in over forty countries , even though it is officially prohibited or restricted . It would therefore not be wise to list some of these countries by name in the detailed report .