The regency is a temporary condition, not a permanent form of government. During the regency, the prince made decisions until the king recovered.
Pro Tip 2/3
Not Always Royalty
Regencies can occur in other contexts where someone takes temporary control. The company was under a regency while the CEO was on sabbatical.
Pro Tip 3/3
Specific Reason
A regency happens for a specific reason like youth, illness, or absence of the ruler. After the accident, a regency ruled in place of the incapacitated queen.