You would have to check this with the breed society, but:
The slaughter ram (as long as being slaughtered by 12 months of age) only needs a single, non-electronic slaughter tag.
The breeding animals would need to be double tagged (EID & Non Eid match up) it is possible to have the breed society numbers on the back of the match-up tag as management information (upto 17 characters)
Hope that helps