Rent Including tax

Dear All,

            One of my friend located at cuddalore, he rented a commerical place Rs.5000 for small show room. They have entered into a agreement for 9 years.

             After that our Govt of India introduced to collect service tax, now the tenent  is not accepting to pay his service tax. There is issue, the agreement itself says rent incl of all tax.

Please give some soultion .