(11) Skilled nursing facility The term skilled nursing facility has the meaning given such term in section 1819(a) of the Social Security Act ( 42 U.S.C. 1395i–3(a) ). (12) Threat of violence The term threat of violence means a statement or conduct that causes a person to fear for his or her safety because there is a reasonable possibility the person might be physically injured, and that serves no legitimate purpose. (13) Workplace violence The term workplace violence means any act of violence or threat of violence that occurs at the work site. The term workplace violence shall not include lawful acts of self-defense or defense of others. The term workplace violence includes the following: (A) The threat or use of physical force against an employee that results in or has a high likelihood of resulting in injury, psychological trauma, or stress, regardless of whether the employee sustains an injury. (B) An incident involving the threat or use of a firearm or other dangerous weapon, including the use of common objects as weapons, regardless of whether the employee sustains an injury. (C) Four workplace violence types: (i) Type 1 violence means workplace violence directed at an employee by a person who has no legitimate business at the work site, and includes violent acts by anyone who enters the workplace with the intent to commit a crime. (ii) Type 2 violence means workplace violence directed at an employee by customers, clients, patients, students, inmates, or any others for whom an organization provides services. (iii) Type 3 violence means workplace violence directed at an employee by a present or former employee, supervisor, or manager. (iv) Type 4 violence means workplace violence directed at an employee by someone who does not work there, but has or is known to have had a personal relationship with an employee. (14) Work practice controls The term work practice controls means procedures, and rules which are used to effectively reduce workplace violence hazards. Work practice controls include, but are not