This is from the APA ethics code. The bolded portion is quite clear, but allows for wiggle room. Obviously, they ca use the title doctor, but need to be clear that they are NOT a licensed psychologist
5.01 Avoidance of False or Deceptive Statements
(a) Public statements include but are not limited to paid or unpaid advertising, product endorsements, grant applications, licensing applications, other credentialing applications, brochures, printed matter, directory listings, personal resumes or curricula vitae or comments for use in media such as print or electronic transmission, statements in legal proceedings, lectures and public oral presentations and published materials. Psychologists do not knowingly make public statements that are false, deceptive or fraudulent concerning their research, practice or other work activities or those of persons or organizations with which they are affiliated.
(b) Psychologists do not make false, deceptive or fraudulent statements concerning (1) their training, experience or competence; (2) their academic degrees; (3) their credentials; (4) their institutional or association affiliations; (5) their services; (6) the scientific or clinical basis for or results or degree of success of, their services; (7) their fees; or (8) their publications or research findings.
(c) Psychologists claim degrees as credentials for their health services only if those degrees (1) were earned from a regionally accredited educational institution or (2) were the basis for psychology licensure by the state in which they practice.