*571.107. Permit does not authorize concealed firearms, where — penalty for violation. — 1. A concealed carry permit issued pursuant to sections 571.101 to 571.121, a valid concealed carry endorsement issued prior to August 28, 2013, or a concealed carry endorsement or permit issued by another state or political subdivision of another state shall authorize the person in whose name the permit or endorsement is issued to carry concealed firearms on or about his or her person or vehicle throughout the state. No concealed carry permit issued pursuant to sections 571.101 to 571.121, valid concealed carry endorsement issued prior to August 28, 2013, or a concealed carry endorsement or permit issued by another state or political subdivision of another state shall authorize any person to carry concealed firearms into:
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(15) Any private property whose owner has posted the premises as being off-limits to concealed firearms by means of one or more signs displayed in a conspicuous place of a minimum size of eleven inches by fourteen inches with the writing thereon in letters of not less than one inch. The owner, business or commercial lessee, manager of a private business enterprise, or any other organization, entity, or person may prohibit persons holding a concealed carry permit or endorsement from carrying concealed firearms on the premises and may prohibit employees, not authorized by the employer, holding a concealed carry permit or endorsement from carrying concealed firearms on the property of the employer. If the building or the premises are open to the public, the employer of the business enterprise shall post signs on or about the premises if carrying a concealed firearm is prohibited. Possession of a firearm in a vehicle on the premises shall not be a criminal offense so long as the firearm is not removed from the vehicle or brandished while the vehicle is on the premises. An employer may prohibit employees or other persons holding a concealed carry permit or endorsement from carrying a concealed firearm in vehicles owned by the employer;
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2. Carrying of a concealed firearm in a location specified in subdivisions (1) to (17) of subsection 1 of this section by any individual who holds a concealed carry permit issued pursuant to sections 571.101 to 571.121, or a concealed carry endorsement issued prior to August 28, 2013, shall not be a criminal act but may subject the person to denial to the premises or removal from the premises. If such person refuses to leave the premises and a peace officer is summoned, such person may be issued a citation for an amount not to exceed one hundred dollars for the first offense. If a second citation for a similar violation occurs within a six-month period, such person shall be fined an amount not to exceed two hundred dollars and his or her permit, and, if applicable, endorsement to carry concealed firearms shall be suspended for a period of one year. If a third citation for a similar violation is issued within one year of the first citation, such person shall be fined an amount not to exceed five hundred dollars and shall have his or her concealed carry permit, and, if applicable, endorsement revoked and such person shall not be eligible for a concealed carry permit for a period of three years. Upon conviction of charges arising from a citation issued pursuant to this subsection, the court shall notify the sheriff of the county which issued the concealed carry permit, or, if the person is a holder of a concealed carry endorsement issued prior to August 28, 2013, the court shall notify the sheriff of the county which issued the certificate of qualification for a concealed carry endorsement and the department of revenue. The sheriff shall suspend or revoke the concealed carry permit or, if applicable, the certificate of qualification for a concealed carry endorsement. If the person holds an endorsement, the department of revenue shall issue a notice of such suspension or revocation of the concealed carry endorsement and take action to remove the concealed carry endorsement from the individual's driving record. The director of revenue shall notify the licensee that he or she must apply for a new license pursuant to chapter 302 which does not contain such endorsement. The notice issued by the department of revenue shall be mailed to the last known address shown on the individual's driving record. The notice is deemed received three days after mailing.
http://revisor.mo.gov/main/OneSection.a ... =29721&hl=
All the legalese, specifically about permit rules but they still hold true as the new law only did away with the permit requirement while still maintaining the rules/restrictions about where it's legal to carry.