before 1000;Middle Englishbihest(e), Old Englishbehǣs promise. See be-, hest
Synonyms
1. order, bidding, decree, dictate, mandate.
Examples from the web for behest
But courts should not be making law at the behest of big companies.
In health care, research is often performed at the behest of companies that have a large financial stake in the results.
However, they do so at the behest of the legislature and the executive.
The speculators are not nationalistic or doing it at the behest of the governments.
In state-controlled companies, senior managers are rotated at the behest of government.
Yesterday, at the behest of a car importer, a judge suspended the application of the tax as it reviewed its legality.
The gangsters are doing this at the behest of their boss.
It's pointless job killing regulation put in there at the behest os special interests.
Cities rose from the forest floor, boasting stone temples with stuccoed and painted facades created at the behest of elite rulers.
To your original question, the expiration is likely at the behest of regulators.
British Dictionary definitions for behest
behest
/bɪˈhɛst/
noun
1.
an authoritative order or earnest request
Word Origin
Old English behǣs, from behātan; see be-, hest
Word Origin and History for behest
n.
Old English behæs "a vow," perhaps from behatan "to promise" (from be- + hatan "command, call;" see cite) and confused with obsolete hest "command," which may account for the parasitic -t as well as the Middle English shift in meaning to "command, injunction" (late 12c.).