Some examples of legal barriers to entry include:

1. Licensing requirements: Laws that require businesses to obtain a license or permit in order to operate. These requirements can be costly and time-consuming, making it difficult for new businesses to enter the market.
2. Zoning regulations: Laws that restrict where businesses can operate based on geographic location. This can make it difficult for new businesses to find a suitable location to set up shop.
3. Intellectual property laws: Laws that protect patents, trademarks, and copyrights can make it difficult for new businesses to enter a market by creating barriers to the use of certain technologies or brand names.
4. Professional certification: Laws that require certain professions to have a certain level of certification before they can practice which can limit the number of entrants in the field.
5. Restrictive contracts: Exclusive agreements between suppliers and distributors that limit the ability of new businesses to access products or services needed to compete in a market.

It's important to note that while legal barriers to entry can protect established businesses and promote market stability, they can also limit competition and stifle innovation.