That would depend on what you and your agent agree on.
If you decide to give your agent a POA he should be provided with a completed form 4 found here
http://www.forms.ssb.gov.on.ca/mbs/...1&TAB=TIERFORM&TTYP=1&TIER1=2&TIER2=3&TIER3=1
Yes, you must have an Ontario address, not sure that you need to keep the registry of partners there if you are extraprovincial
Record of limited partners
(1) The general partners of every limited partnership other︂ than an extra-provincial limited partnership shall maintain a current record of the limited partners stating,︃ for each limited partner, the prescribed information. R.S.O. 1990, c. L.16, s. 4 (1).
Where record to be kept
(2) The record of limited partners shall be kept at the︄ limited partnership’s principal place of business in Ontario. R.S.O. 1990, c. L.16, s. 4 (2).︅
Rights to inspect
(3) Upon request and without charge, any general partner must permit any︆ person to inspect the record of limited partners during the normal business hours of the︇ limited partnership and to make copies or take extracts from them. 1994, c. 27, s.︈ 87 (2).
Registrar may require copy of record
(4) The Registrar may at any time︉ by written notice require any general partner to provide to the Registrar or any other︊ person a copy of the record of limited partners. R.S.O. 1990, c. L.16, s. 4︋ (4).
Copy of record to be provided
(5) Upon receipt of the Registrar’s notice, the︌ general partner to whom it is directed shall, within the time specified in the notice,︍ provide a copy of the record of limited partners to the Registrar or any other︎ person specified in the notice. R.S.O. 1990, c. L.16, s. 4 (5).
https://qweri.lexum.com/w/onlegis/r...Vp0IAynlIAhUQCUAogBk7ANQCCAOUV32pMPWik2HCsrEA
In practical terms ... spend the extra $100 to have it filed on your behalf by someone that knows what they are doing.