system: You are a contract-analysis assistant performing a span-extraction task. You are given an excerpt from a commercial contract and the name of a clause type to locate within it.

Return the exact text of the requested clause, copied verbatim from the excerpt — identical wording and punctuation, with no paraphrasing, summarising, explanation, or added commentary.

The excerpt is one window of a much longer contract and often will not contain the requested clause. If the requested clause does not appear in this excerpt, respond with exactly: Not found.

Output only the extracted clause text, or the exact string `Not found.` — nothing else.

user: Contract excerpt:
"""
EXHIBIT 10.13 JOINT VENTURE AGREEMENT Collectible Concepts Group, Inc. ("CCGI") and Pivotal Self Service Tech, Inc. ("PVSS"), (the "Parties" or "Joint Venturers" if referred to collectively, or the "Party" or Joint Venturer" if referred to singularly), by this Agreement associate themselves as business associates, and not as partners, in the formation of a joint venture (the "Joint Venture"), for the purpose of engaging generally in the business provided for by terms and provisions of this Agreement. 1. Name of the Joint Venture. The name of the Joint Venture will be MightyCell Batteries, and may sometimes be referred to as "MightyCell" or the "Joint Venture" in this Agreement. The principal office and place of business shall be located in 1600 Lower State Road, Doylestown, PA 18901. 2. Scope of the Joint Venture Business. The Joint Venture is formed for the purpose of engaging generally in the business of marketing batteries and related products, (the "Products") that include the display of licensed logos, images, brand names and other labels that differentiate them from the branding (the "PVSS Products") under which PVSS and/or its affiliates, sell to retailers and distributors in the normal course of their business. Without in any way limiting the generality of the foregoing, the business of the Joint Venture shall include: (a) The purchase of Products for resale; (b) The acquisition of a license(s) permitting the use of selected images in the Products; (c) The sale and distribution of the Products to retailers and distributors; and, (d) The transaction of such other and further business as is necessary, advisable, or incidental to the business of the Joint Venture. (e) Develop a global marketing program for licensed Products Exhibit A attached hereto, describes by way of example but not limitation the responsibilities of the Joint Venturers 3. Capital Contributions. Except as agreed upon by mutual consent, the Joint Venturers shall not be required to make any capital contribution to the Joint Venture. 4. Offices of the Joint Venture. The principal place of business of the Joint Venture shall be at 1600 Lower State Road, in the City of Doylestown, Bucks County, Pennsylvania, but may maintain such other offices as the Joint Venturers may deem advisable at any other place or places within or without the Commonwealth of Pennsylvania. 5. Powers and Authority of the Joint Venturers. The Joint Venturers shall have full and complete charge of all affairs of the Joint Venture. The Joint Venturers recognize that both of the Joint Venturers are and will continue to be engaged in the conduct of their respective businesses for their own account. Neither Joint Venturer shall be entitled to compensation for services rendered to the Joint Venture as such, but each Joint Venturer shall be reimbursed for all direct expenses, including travel, office, and all other out-of-pocket expenses incurred in the operation of the affairs of the Joint Venture and the promotion of its businesses. It is agreed that either Joint Venturer shall, except as provided for below, have authority to execute instruments of any character relating to the affairs of the Joint Venture; provided, that without the written consent or approval of both of the Joint Venturers: (i) the Joint Venture shall incur no liability of any sort, nor any indebtedness for borrowed funds; (ii) no assets owned in the name of the Joint Venture be disposed of; and (iii) no commitment to purchase any item for the Joint Venture shall be made. 39 6. Division of Income and Losses. All income and credits, and all losses and deductions shall be owned and shared among the Joint Venturers as follows: 50% to Collectible Concepts Group, Inc. 50% to Pivotal Self Service Tech, Inc. Depreciation and all other charges and expenses, which are not expressly apportioned by this Agreement, shall be apportioned in accordance with generally accepted accounting principles, consistently applied. 7. Accounting Provisions. The Joint Venturers shall maintain adequate books and records to be kept of all the Joint Venture activities and affairs conducted pursuant to the terms of this Agreement. All direct costs and expenses, which shall include any insurance costs in connection with the distribution of the Products or operations of the Joint Venture, or if the business of the Joint Venture requires additional office facilities than those now presently maintained by each Joint Venturer, such item shall be paid by the Joint Venture. The fiscal year of the Joint Venture shall be the calendar year, and shall use the cash basis of accounting. If requested by a Joint
"""

Extract the exact clause related to "Effective Date" from the excerpt above.