Русско-англо-русский юридический словарь

A creditor cannot validly enforce a pledge of the property made unilaterally by one of the spouses. (Real Estate Law by Marianne Jennings)

termination for default: Standard contract clause which gives a customer the right to unilaterally terminate the contractor if the contractor fails to perform according to the specified terms. (BusinessDictionary)

In general, the Vienna Convention says that a party can't unilaterally withdraw or denounce a treaty. (Chicago Tribune)

Thus, Sugarland can not now claim that, even though Advanta purchased the RICs from Argo in good faith, Sugarland was entitled to unilaterally and extrajudicially deem the assignment agreement between it and Argo to be dissolved simply because Argo failed to pay it the agreed-upon purchase price. (FindLaw)