Русско-англо-русский юридический словарь

Insurable interest exists when an insured person derives a financial or other kind of benefit from the continuous existence of the insured object (or in the context of living persons, their continued survival). A person has an insurable interest in something when loss-of or damage-to that thing would cause the person to suffer a financial loss or other kind of loss. (Wikipedia)

In legal theory, a default rule is a rule of law that can be overridden by a contract, trust, will, or other legally effective agreement. Contract law, for example, can be divided into two kinds of rules: default rules and mandatory rules. Whereas the default rules can be modified by agreement of the parties, mandatory rules will be enforced, even if the parties to a contract attempt to override or modify them. (Wikipedia)

In legal theory, a default rule is a rule of law that can be overridden by a contract, trust, will, or other legally effective agreement. Contract law, for example, can be divided into two kinds of rules: default rules and mandatory rules. Whereas the default rules can be modified by agreement of the parties, mandatory rules will be enforced, even if the parties to a contract attempt to override or modify them. (Wikipedia)

The presumption of good faith or bona fides is essentially a civil law concept with a long history going back to Roman law that is specifically made applicable in contract law. The term is applied to all kinds of transactions. Thus, Art. 527 of the Civil Code states: Good faith is always presumed, and upon him who alleges bad faith on the part of a possessor rests the burden of proof. (http://manilastandardtoday.com)