2.4 Entry into force
The Ottawa treaty entered into force, that is, became binding
international law, on 1 March 1999. For that to happen, 40 States had to deposit
an instrument of ratification with the Secretary-General of the United Nations
as notification of their consent to be bound by the treaty. The 40th
ratification was submitted by Burkina Faso in September 1998 and, in accordance
with Article 17, the treaty entered into force six months later and will apply
indefinitely.
States which have the treaty signed but not yet submitted an
instrument of ratification to the UN Secretary-General are not bound by its
provisions. A States signature is not of itself enough to bind the
signatory to respect all of its provisions. Signing a treaty does, however,
signal the intention to adhere formally at a later date (through
ratification, approval or acceptance) and international law
requires that a signatory must not do anything that undermines the object
and purpose of the treaty. The two-stage process of signature followed by
formal adherence is intended, for instance, to allow national parliaments or
legislatures to debate the treaty and its implications for the country before a
final decision is made whether or not to become bound by its provisions.
Following its entry into force on 1 March, the Ottawa treaty is
no longer open for signature. Nonetheless, countries which have not signed it
may still formally adhere to it by a one stage process called accession.
Any State may accede directly to the treaty in place of signature and
ratification, thereby binding itself to respect its
provisions.