The phrase "signatory approval" is correct and commonly used in written English.
It refers to the act of giving consent or permission as a signatory on a document or agreement. Here is an example of how it can be used in a sentence: "The contract cannot be finalized without signatory approval from all parties involved."
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The protocol, including the exemption of written informed consent, received signatory approval from the Egyptian Ministry of Health and Population prior to IRB approval.
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Lithuania secretly informed the signatories of the Klaipėda Convention about these demands, since technically Lithuania could not transfer Klaipėda without the approval of the signatories.
Ms. McDonald and Ms. Redmond then became the new signatories on the account without approval of the committee, Mr. Houlihan said.
It remains to be seen how the TPP would actually function in the event it receives final approval by the US Congress and the other signatory countries.
The proposed treaty has 11 of the 25 signatory nations required to ratify; the U.S. Senate voted approval in April of this year.
A statement released by the FIA has confirmed that framework "has now come into force following the approval of the respective governing bodies of the signatory parties".
The long approval process and the need for more than five signatories before securing access to the fund has prevented the scheme from being an urgent source of complementary funding during drugs crises at the facilities.
In Europe and all countries that are signatories to the Cartagena Protocol, environmental risk assessment (ERA) is required for the regulatory approval of GM organisms (GMO) (CBD 2000, Annex II; 6; 1, Annex III) [1].
All the signatories to the Montreal Protocol would have to agree to the expansion, but no further approval from Congress would be needed.
According to their investigation, most of these projects have applied for approval under the CDM, which would make them eligible for payments from Kyoto signatories, even though China's latest five-year economic plan calls for major investments in alternative energy to shift the country away from coal.
"The president is optimistic about it being passed by the Congress but [congressional approval] seems to be to be the major domestic obstacle of all the 12 [signatories].
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Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com