IMO

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Note added at 9 mins (2015-04-08 11:18:24 GMT)
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Alternatively, does not go into effect.

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Note added at 13 mins (2015-04-08 11:22:02 GMT)
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If this Agreement does not come into force provisionally under paragraph 2 of this article within two years from 1 October 1980, the Secretary-General of the ...
https://books.google.com/books?id=muRdjHkeRj8C&pg=PA685&lpg=...
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the date of coming into force, if the agreement does not come into force on the date of its conclusion;
https://books.google.com/books?id=L4EeRU2FfJoC&pg=PA360&lpg=...
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The agreement does not come into force unless and until the General Manager enters particulars of the agreement in the register kept under paragraph ...
https://books.google.com/books?id=fHZXzEjldg0C&pg=PA1003&lpg...
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hen the Agreement does not come into force in relation to a State on 1 July, from the date it comes into force up to and including 30 June which next occurs ...
http://www.austlii.edu.au/au/legis/nsw/consol_act/rasaa19933...
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- If the Agreement does not come into force, those items do not commence at all.
https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&c...
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Note added at 14 mins (2015-04-08 11:23:04 GMT)
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This Agreement does not come into force and effect until financial close (the execution and delivery of all financing documents) for the ML ...
http://novascotia.ca/maritimelink/key-dates.asp
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even though the Agreement does not come into force until 1 January 2013. The. Agreement's main objective is the recovery of unpaid tax (including IHT) on ...
http://www.rooksrider.co.uk/wp-content/uploads/2013/06/Asset...
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A może tak?

(I believe this is more elegant than "does not come into effect", but others may disagree.)
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Google hits:
does not enter into effect = 37.3 million.
does not come into effect = 13 thousand.

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Note added at 2 hrs (2015-04-08 13:44:53 GMT)
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unless the premium ... is paid (etc.)

Legal Notices | Precision Micro
www.precisionmicro.co.uk/165/legal-notices/
1.2 A Contract shall not be effective until the Seller has issued written acknowledgment and acceptance of such Contract (notwithstanding any earlier ...
[PDF]CONDITIONS OF SALE - Isuzu Trucks
www.isuzutruck.co.uk/downloads/conditionsofuse.pdf
The Contract shall not be effective unless and until it is signed by both the Seller and the Purchaser. 12. Third Parties. Unless expressly provided in these Terms, ...
[PDF]Terms & Conditions
www.gem-group.co.uk/downloads/terms&conditions.pdf
All notices required to be given by the Buyer to the Seller in respect of this contract shall not be effective unless in writing and sent to the Seller at its address ...
Terms and Conditions of Sale - Orion Audio Visual
www.orionav.com/terms-conditions
All notices required to be given by the Buyer to the Seller in respect of this contract shall not be effective unless in writing and sent to the Seller at its address as ...
[DOC]Personal Services Contract - Model - Rev 12 31 13 clean
https://www.colorado.gov/.../Personal Services Contract - .....
This Contract shall not be effective or enforceable until it is approved and signed by the Colorado State Controller or designee (hereinafter called the “Effective ...

AEP states that, although the agreement did not come to fruition, it believes that both Northeastern and AEP engaged in good faith efforts - http://goo.gl/9V6Tde

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As discussed above, the agreement did not come to fruition and, if it had, it would have ended when the declaratory ruling after trial - http://www.ctreg14.org/uploaded/BOE/BOE_Agendas/Decision_on_...

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As a matter of fact the agreement did not reach fruition. - http://taxguru.in/income-tax-case-laws/cit-ms-atam-prakash-s...

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But the agreement did not reach fruition for many reasons, one of which was probably the mistake we made in not keeping the deal a secret - http://goo.gl/qvlkhu