[Flabbibulin]

There is an interprovincial subpoena act that covers this very thing...

http://www.e-laws.gov.on.ca/html/sta...es_90i12_e.htm

The witness fees and travelling expenses required to be given to the witness upon service of an interprovincial subpoena shall be a sum of money, or sum of money together with valid travel warrants, sufficient to satisfy the following requirements:

1. The fare for transportation by the most direct route via public commercial passenger carrier between the witness' place of residence and the place at which the witness is required to attend in court, in accordance with the following rules:

If the journey or part of it can be made by air, rail or bus, that portion of the journey shall be by airline, rail or bus by tourist class or equivalent class via carriers on which the witness can complete his total journey to the place where he is required to attend in court on the day before his attendance is required.
If railway transportation is necessary for part of the journey and sleeping accommodation would normally be obtained for such a journey, the fare for sleeping accommodation shall be included.

In the calculation of the fare for transportation, the most rapid form of transportation by regularly scheduled carrier shall be accorded priority over all other forms.

If the material which the witness is required to produce in court is of such weight or size as to attract extra fares or charges, the amount so required shall be included.

2. The cost of hotel accommodation for not less than three days at the place where the witness is required to attend in court, in an amount not less than sixty dollars.

3. The cost f meals for the total journey and for not less than three days at the place where the witness is required to attend in court, an amount not less than forty-eight dollars.

4. In addition to the amounts described above, an allowance of twenty dollars for each day of absence from the ordinary residence of the witness, and the witness shall be paid on account of this allowance not less than sixty dollars.