According to Elsevier’s policies and editor contracts our editors have a duty to pursue suspected misconduct. What if an editor refuses to follow up a blatant case of plagiarism?
Any such neglect should be taken into account when evaluating an editor’s performance.

What should you do when an investigation cannot be carried on, in the majority of cases because of lack of response from authors or institutions? Or when the response from the institution is not adequate? Should the case be abandoned or can the editor still express/publish concerns?
As noted, we believe that it is fair for an editor to draw an inference from a lack of response from the allegedly wrong-doing author or author community. The editor should also consider and evaluate responses and judge based on their knowledge and experience in the field whether a response is more or less likely to be true. These matters should not be abandoned.

If a fairly clear-cut case of plagiarism or self-plagiarism is discovered several years after the fact, to what degree does the editor or publishing contact need to go to contact the authors for explanation, if the authors have retired, are deceased, or have moved on to whereabouts unknown?
We must collectively do the best job we can. Fraud and other ethical issues are often discovered years after the fact.

The status of international company may be granted to a CA enterprise in any of the following cases:

a) if the enterprise has at least two years of experience in carrying out the permitted activities, on the basis of which it applies to obtain the status;

b) if the enterprise is a representative of a non-resident enterprise, which has at least two years of experience in the permitted activities.

Virtual Zone Entity (VZE) is an LLC or JSC which is registered in CA, which provides Information Technology (IT) services abroad and gets the status from CA authorities.

Under Information Technology, CA tax code defines following activities: the study, support, development, design, production, and implementation of computer information systems, as a result of which software products are obtained.

VZEs are fully exempt from Corporate Income Tax on profit that the company gets from provision of Information Technologies (services) outside of CA; They are fully exempt from VAT on provision of Information Technologies outside of CA. As a result, normally, companies pay only 5% dividend tax on the dividends distributed to the shareholder. And that’s it.