Since the CTZ is located in the medulla oblongata, it therefore does not have a specific blood-brain barrier.

For each audience segment the model provides associated areas of focus for outreach and social marketing designed to target specific barriers and motivations.

In more detail, Bacon enumerated several specific such barriers to science which result from the specific traits of individuals, coming into this category:

Under the Coastal Barrier Resources Act of 1982, Washington cannot supply flood insurance for specific coastal barriers or money for development, such as bridge and road building.

Currently there are no specific barriers preventing an LGBT individual from adopting children, except that a male individual cannot adopt a female child.

There are no specific barriers in the laws, only in the prejudices of the administrators.

In more detail, Bacon enumerated several specific such barriers to science which are part of human nature, coming into this category:

Instead, the Committee on Economic and Monetary Affairs agrees that we should focus on targeted measures aimed at removing specific barriers to cross-border mortgages.

The mentality surrounding overtime may be one of the specific barriers.

If the mutual recognition principle ensures free movement and no specific barrier exists, then no further additions are needed and the technical specifications should be adopted by the Member States.