[gpderetta]

also relevant form the annex:

(j) enabling the seller or supplier to alter the terms of the contract unilaterally without a valid reason which is specified in the contract [1];

And the annex list is not exclusive. In general any term that is not in good faith is considered non binding for consumer contracts if there was not individually negotiated.

[1] There are nuances, for example such a term might be valid as long as the customer has the option of terminating the contract.