[TFO Letterhead] [Gate 3 Confirmation of Receipt of Customer Security] The provision of this security is a requirement to pass Gate 3. [TFO Address] Attn: [Project Contact] Dear [Name]: Re: XXX – [Customer Name] [Project Name] (the “Project”) – Gate 3 Confirmation of Receipt of Customer Security This letter serves as confirmation of receipt of additional security from [Customer] in the amount of [$X] effective [insert Date] to cover additional Stage 3 and 4 costs associated with the Project that have arisen since provision of the Gate 2 Confirmation of Receipt of Customer Security; and that the CCA has been revised to reflect the change in costs. Stage 3 and 4 costs are defined as the amount of costs estimated to be incurred by the Transmission Facility Owner (“TFO”) from the time the Connection Proposal is accepted to when the Permit and License required to connect the Project to the Alberta Interconnected Electric System is issued to the TFO by the Alberta Utilities Commission. These costs may include costs associated with siting, detailed engineering or procurement of equipment with long lead times such as transformers and breakers. Should you have any questions or concerns regarding the above, please contact [TFO Contact] at (xxx) xxx-xxxx. Yours truly, [Insert Signatory] [Insert Title] cc [TFO Contact] Public Transmission Project Delivery 1 R3-2015-11-12