Final answer:
A listing Salesperson should present all written offers to the seller as soon as reasonably possible, often within 24 hours, according to many state regulations and industry standards.
Step-by-step explanation:
The length of time a listing Salesperson has to transmit all written offers to the seller is typically mandated by state laws or real estate commission rules within the state where the sale is occurring. However, a commonly adopted standard in the industry is that all written offers should be presented to the seller as soon as reasonably possible, without unnecessary delay. In some jurisdictions, this may be specified as within 24 hours after the offer is received unless the seller has specifically provided other instructions.