The phrase 'supplementary contract' is correct and usable in written English.
It typically refers to an additional contract or agreement that has been put in place to supplement an existing contract. For example, "The new supplementary contract provides additional benefits to the employees."
Thus one form of supplementary contract provides that the amount of the policy shall be left on deposit with petitioner.
He further disputes a supplementary contract relied on by Cherney which purports to show Deripaska agreeing to pay his rival the equivalent of 20% of the value of Rusal shares, less the $250m.
6 In that case, high-risk individuals may not be able to switch to another, more attractive supplementary contract.
Nevertheless, we find that many high-risk individuals do not (consider to) switch because they believe that they will not be accepted on another supplementary contract.
These optional modes of settlement are exercised under supplementary contracts.
Furthermore, to determine whether supplementary health insurance is used for self-selection, we examined whether the supplementary contracts were designed to attract specific (favorable) risk groups.
As a consequence, high-risk individuals may be forced to stick with their current supplementary contracts, since no better alternatives will be available.
A lock-in situation for high-risk individuals may occur if the premium they pay for their current supplementary insurance contract is below the actuarial fair price, while when they apply for another contract they have to pay a premium as high as the actuarial fair price.
Hence, each supplementary insurance contract involves some cross-subsidization from low-risk to high-risk individuals.
Hence, high-risk individuals believe they are locked-in in their current supplementary insurance contract.
However, this low proportion can be misleading, since only a limited number of people actually apply for an (other) supplementary insurance contract.
