She can walk in and buy it anywhere it's sold or she can order it online and have it shipped to her. No license needed to carry it but it can be no larger than 2 oz.
This is arguably the best stuff going - Link Removed
790.01 Carrying concealed weapons.—
(1) Except as provided in subsection (4), a person who carries a concealed weapon or electric weapon or device on or about his or her person commits a misdemeanor of the first degree, punishable as provided in s. 775.082 or s. 775.083.
(2) A person who carries a concealed firearm on or about his or her person commits a felony of the third degree, punishable as provided in s. 775.082, s. 775.083, or s. 775.084.
(3) This section does not apply to a person licensed to carry a concealed weapon or a concealed firearm pursuant to the provisions of s. 790.06.
(4) It is not a violation of this section for a person to carry for purposes of lawful self-defense, in a concealed manner:
(a) A self-defense chemical spray.
(b) A nonlethal stun gun or dart-firing stun gun or other nonlethal electric weapon or device that is designed solely for defensive purposes.
(5) This section does not preclude any prosecution for the use of an electric weapon or device, a dart-firing stun gun, or a self-defense chemical spray during the commission of any criminal offense under s. 790.07, s. 790.10, s. 790.23, or s. 790.235, or for any other criminal offense.
790.001 Definitions.—As used in this chapter, except where the context otherwise requires:
(b) “Tear gas gun” or “chemical weapon or device” means any weapon of such nature, except a device known as a “self-defense chemical spray.” “Self-defense chemical spray” means a device carried solely for purposes of lawful self-defense that is compact in size, designed to be carried on or about the person, and contains not more than two ounces of chemical.