What jurisdiction do boards of health or planning boards have under the Building Code Act?

The correct answer reflects the specific scope of authority that boards of health or planning boards have within the framework of the Building Code Act. These boards are typically granted jurisdiction in prescribed municipalities that may not have established their own organized enforcement mechanisms or building departments. This means that, in those particular municipalities, boards of health or planning boards take on the responsibility of ensuring compliance with the Building Code, thus acting as a critical resource for oversight in areas that may otherwise lack such organization.

The emphasis on "prescribed municipalities" is key, as it highlights that their jurisdiction is not universal across all municipalities. Instead, it is applied selectively, which corresponds to the needs for governance in specific regions.

On the other hand, the other choices suggest broader or different applications of authority that do not align with the intent of the Building Code Act. Some options imply a universal enforcement or full authority over all projects, which would not be accurate under the referenced legislation, as not all municipalities require or have the same level of governance. Adopting an advisory role without enforcement would diminish the boards' influence in municipalities needing oversight, thus failing to utilize their intended power effectively. The nature of the authority described in the correct choice reinforces the importance placed on localized governance in the context of building regulations