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Claims Made Vs Occurrence Policies There are two primary forms of liability insurance policies - claims-made and occurrence policies. Most professional liability insurance, including directors and officers and employment practices liability insurance, is written on a claims-made basis.

An occurrence policy obligates the insurance company to pay for claims arising out of occurrences during the policy period regardless of when the claim is reported. The policyholder is covered for any incident that occurs during the term of the policy regardless of when the claim arising from the incident is reported to the company. In some situations the claim might be made many years after the incident occurred. This leads to uncertainty for both the insured and the insurer.

A claims-made policy protects an insured against claims or incidents that are reported while the policy is in force. Normally, a claims made policy provides coverage for acts occurring prior to the claims-made policy period. Coverage for acts occurring prior to the policy period is called "prior acts coverage," and the period prior to the policy period for which claims are covered is called the prior acts period. Prior acts coverage is usually only provided when a claims-made policy has been in force immediately prior to the current claims-made policy on a basis consistent with the prior policy. Prior acts coverage is defined as "full prior acts", covering acts occurring at any time prior to the current policy period, or is defined by a "retroactive date." When a retroactive date is used, prior acts coverage is provided from the retroactive date to the current policy period.

I've never heard of primary vs. secondary sources ofreading, but I can provide an answer on primary vs. secondary sources of data.

A secondary source of data is data that was collected for a reason other than the task at hand. A good example is US Census data. Marketers might use census data as input into decisions. An example of application of this data is as follows. Suppose you want to distribute your product in the 5 most populated cities in the US. You could find this info from census data, and go about distributing your product in those 5 cities.

A primary source of data is data that is collected specifically for the task at hand, often via a market research study. For example, if you wanted to know what features of your product are most valued to buyers, you would design a market research study (i.e. questionnaire) to find that out. At the end of your study, you'd have the data to answer your question.

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Note that there is quite a trade in used data. There's nothing wrong in this, provided all the relevant information about things like the purpose and reliability and possible sources of distortion of the old data are taken into account.