society employer krksz guided by city charter formula for hired on or before january 9, 2009.he medical will prescription drug and core vision plan contribution amounters based on the throw components. as described below in the city charter. two are developed separately the one is the same is 10 county amount that gets approved in march. the first element that vary system when we have called the difference. what it means is a difference in the single tier premiums the nonmedicare retire and he was active employees. there is -- stlor what the active employees would receive. this is what is covers that difference. between the retiree only rate for a plan and the active rate for a begin plan. and the second element is the prop e contribution provides additional contribution for the retiree only and the family tiers. it is geared the cost of retiree plus one tier. we have common this is show that. and then the prop e contribution is the same for both retiree plus 1 and 2 or more this provides additional city contribution for the retiree only and the first department of a retiree c