Inclusion of Ts&Cs
Russian law requires that the Ts&Cs must be agreed by the parties in order to be part of the contract.
To include Ts&Cs into the contract parties shall make a reference to a particular version of Ts&Cs to avoid any ambiguities.
A reference to one‘s Ts&Cs on offer documents is sufficient (unless there is a Battle of Forms situation) if the other party does have an access to such Ts&Cs.
From a Russian law perspective, under the CISG, the situation equals the situation described for national law.
Battle of Forms
Under Russian law, the Last-Shot Rule applies.
From a Russian law perspective, under the CISG, the Last-Shot Rule applies.