Final answer:
The primary factors determining the duration a sold sign can remain on a property are local municipal zoning bylaws and community association rules, which may be influenced by the area's historic or cultural significance.
Step-by-step explanation:
The duration a sold sign is allowed to remain on a property can be determined by several factors. While the seller's preference and requests by the buyer may carry some weight, the prevailing determinants are typically local municipal zoning bylaws or community association rules. These governing documents may outline specific time frames during which signage can be displayed after the sale of a property. They encompass a range of restrictions including, but not limited to, the frontage of lots, minimum lot area, and the number of dwelling units in an area. Moreover, in regions of historic or cultural significance, these regulations may require the preservation of specific architectural or cultural features, which can also influence the regulations surrounding real estate signage.