If the restriction had effect only in personam, the parties would be able to agree on it irrespective of the first phrase of paragraph 1, in which case the phrase could be deleted.
如果这种限制规定只对人有效，双方当事人就能够就此达成一致，而不用考虑第1款开头的短语，在这种情况下，该短语可以删除。