In no way do I mean to challenge what you say... I'm just confused because it seems to clash with the wording in the Provincial Offences Act.
If I understand the Act correctly, you have 30 days to lay a charge by way of a Part I certificate (usually a ticket at the side of the road).
PART I
COMMENCEMENT OF PROCEEDINGS BY CERTIFICATE OF OFFENCE
...
3. (1)... a proceeding in respect of an offence may be commenced by filing a certificate of offence.
...
(3) The offence notice or summons shall be served personally upon the person charged within thirty days after the alleged offence occurred. R.S.O. 1990, c. P.33, s. 3 (1-3).
IF a Part I is not layed, you have 6 months to lay an information (charge) by way of Part III summons. It says that you can not use the Part III option if you have already used the Part I option on the same charge.
PART III
COMMENCEMENT OF PROCEEDING BY INFORMATION
21. (1) ... a proceeding in respect of an offence may be commenced by laying an information.
Exception
(2) Where a summons or offence notice has been served under Part I, no proceeding shall be commenced under subsection (1) in respect of the same offence except with the consent of the Attorney General or his or her agent. R.S.O. 1990, c. P.33, s. 21.
LIMITATIONS 76. (1) A proceeding shall not be commenced after the expiration of any limitation period prescribed by or under any Act for the offence or, where no limitation period is prescribed, after six months after the date on which the offence was, or is alleged to have been, committed.
So to the layman (me) it would appear that a Part I certificate can not be re-issued after 30 days, AND a Part III is not permitted since the Part I has already been used. The Crowns only options would be to try the case based on the particulars stated on the face of the Part I certificate (ticket), or withdraw the charge.
When you describe a "long form" summons, I would assume you are describing the Part III summons, which you swear to before a Justice of the Peace (extra leg work and cost). I see no other section in the Act that describes this "long form" you mention.
Not being argumentative. Just trying to learn stuff... 