Renewal of Iqama which is more than 6 months validity

Hi,

I would like to know whether it is officially possible to renew the iqama which is more than 6 months valid now ?

If not possible, then would MOI accept any valid reason (medical) and renew it in advance ?

possible 90 days before only  officially, is some one have good contacts in jawazat office they can do only 6 months before