During the legal existence of an employment relationship, the employee is fundamentally prohibited from any competitive activity to the detriment of his employer, even without corresponding individual or collective agreement regulations (see only BAG September 20, 2006 – 10 AZR 439/05 -). In a decision of March 24, 2010 (- 10 AZR 66/09 -), the Tenth Senate expressed concerns as to whether this also applies to simple (side) activities, which can at best lead to subordinate economic support for the competing company and otherwise do not affect the employer’s interests worthy of protection. When determining the scope of the non-competition clause in the current employment relationship, the provisions of Art. 12 para. 1 GG protected occupational freedom of the employee must be taken into account. This suggests that, as part of an overall assessment of all the circumstances of the individual case, it must be determined whether the other activity endangers or impairs the interests of the employer. In the event of a decision, the Senate could leave this question hanging. Due to the collective bargaining regulations relevant to the plaintiff, the general non-competition clause was restricted in favor of the employees during the ongoing employment relationship. A secondary employment at a competing company could only be prohibited if reasons of “direct competition” spoke against it. Such reasons only exist if the employee’s position or the type of activity threatens to directly harm the employer’s interests worthy of protection. In the case of the dispute, the Senate rejected these requirements. A non-competition agreement agreed for the period after the termination of the employment relationship is in accordance with Section 74a Para. 1 Sentence 1 HGB is non-binding for the employee insofar as it does not serve to protect a legitimate business interest of the employer. According to a ruling by the Tenth Senate of April 21, 2010 (- 10 AZR 288/09 -), the employer lacks such an interest if he also prohibits the former employee from carrying out sales activities at a commercial level at which the employer is not involved operated. In this case, for the employee to be entitled to payment of waiting compensation, it is sufficient that the employee observes the prohibition in its binding part. Unlike Section 74 Para. 2 HGB, the maternity leave compensation does not depend on the employee exercising a right to choose in favor of compliance with the entire non-competition clause. This is shown by the explicit differentiation in Section 74a Paragraph. 1 HGB between the binding and the non-binding part of the ban. In addition, it would contradict the protective purpose of this norm and the professional freedom protected by Article 12 of the Basic Law if the right to compensatory leave depended on the employee also complying with the ban in its non-binding part. Due to the freedom of contract, according to a decision of the Tenth Senate of July 14, 2010 (- 10 AZR 291/09 -), preliminary contracts are generally permitted even in the case of non-competition clauses. If the employee undertakes in the preliminary contract to conclude a post-contractual non-competition clause at the employer’s request, this preliminary contract is in accordance with Section 74a Para. 1 Sentence 1 of the German Commercial Code is non-binding if the option granted to the employer is not limited to the time until notice of termination is given or until a termination agreement is concluded. Without a fixed time limit for the obligation, the situation and interests for the employee are similar to those of an impermissibly conditional non-competition clause (cf. BAG May 22, 1990 – 3 AZR 647/88 -). Since the preliminary contract in this case has the effect of a non-binding non-competition clause, the employee can choose between freedom of competition without compensation and non-competition under the conditions of the preliminary contract. No decision was required as to whether, in the case of a non-binding preliminary contract, the employee must declare to the employer how he would exercise his right to choose. The legal dispute was referred back to the lower court. It has not been clear from the findings so far whether the written form requirement that also applies to the preliminary contract, which is required under Section 74 Para. 1 HGB must be observed in non-competition clauses had been complied with.