Under what circumstances can healthcare facilities write up the cost of property, plant, and equipment?

The correct choice reflects a key principle in accounting regarding the valuation of property, plant, and equipment. Healthcare facilities are generally bound by accounting standards that dictate how assets can be revalued or written up. Writing up the cost of property, plant, and equipment typically occurs in limited circumstances and is not a regular practice in financial reporting.

For instance, significant increases in the value of an asset often happen due to appraisals or market evaluations, but these occurrences are specifically regulated and don't occur routinely. The notion of exceptions underscores the rarity of such actions in standard financial procedures for healthcare facilities. Regular annual financial reporting typically involves depreciation rather than revaluing assets upward, which reinforces the understanding that significant cost write-ups are exceptions rather than the norm.

In contrast, significant market demand or internal appraisals leading to increased values do not inherently justify regular write-ups. These are not established practices within the framework of standard accounting principles.