NO, even agasint govt. you can claim title on the basis of adverse possession.

See if you have possession from 1956 you can claim tenancy of the property based on paid.based on timely rent paid claim the benifit.

It is not clear how the property is to be handed over to the Government.

If the property is acquired by the government by any gazette notification then only the government requisition the same for the purpose for which is acquired the same.

The process of acquisition can be challenged only by the lawful owner . If you can not establish the title over this property the government will not award the requisition money to you and still would take physical possession of the same.

1) you cannot be evicted without due process of law 

2) since you are in occupation since 1956 you cannot be forcibly evicted 

1. You are paying the rent to the tenant which establishes that you aev his sub tenant.

2. You must be having your PAN Card, Vorter ID Card and also Aadhar Card made showiung the said sub-tenanted address as your address to prove that you have been staying therein since 1956.

3. Has anybody filed an eviction suit against you?

4. If yes, then you shall have adequate evidence to prove that you are te sub-tenant therein to defend your case.

5. If eviction has been filed by some one, then you shall have to act as per Court's direction only.

You can not be evicted,only court have power to evict you.

Till you are not been evicted or send any notice from Court you don't have to evict. You can contest the same 

Where do you pay the rent?

If you are paying the rent to the court deposit, then you may claim tenancy rights or protection.

If the case pending in court, who filed it?

It depends on what grounds that they are seeking eviction and what is your defence.