Freedom of movement for persons ° Freedom of establishment ° Companies ° Directive 77/91 ° Change in the capital of a public limited company ° Shareholders' right of pre-emption provided for in the event of an increase in capital by contributions in cash ° National legislation granting a right of pre-emption in the event of an increase in capital by contributions in kind ° Permissibility (Council Directive 77/91, Art. 29(1) and (4))