"hereby establish" is correct and can be used in written English.
It is used to emphasize that something is being officially declared or created. For example, "We hereby establish the Smith-Jones Foundation as an organization to provide educational services."
The Parties hereby establish a Council, on which each of them shall be represented, to consider matters concerning the implementation of this Treaty.
They develop, produce, and market devices for specific applications (domain engineering) and hereby establish a continuously growing pool of market available devices.
The Parties hereby establish and undertake to maintain a Permanent Water Commission (hereinafter called the "Commission").
Such a provision might be as brief as the following annex at the end of a trade in goods chapter: " Medicines and Medical Devices Safety, Efficacy and Cost-Effectiveness Committee The Parties hereby establish this Committee, comprising relevant officials and expert advisors from each Party.
There is hereby established as an independent establishment in the Executive Branch, the Federal Emergency Management Agency (the "Agency").
There is hereby established the Commission on Ocean Policy.
There is hereby established the "Community Enterprise Assessment CreditBoard".
In subsection (a)(1), the word "is" is substituted for the words "is hereby established".
There is hereby established the Commission on Presidential Scholars (hereinafter referred to as the Commission).
An Israeli-Jordanian Liaison Committee is hereby established in order to deal with all matters arising under this Annex.
There is hereby established in the Unemployment Trust Fund an employment security administration account.
