Partnership (shutafut, שותפות) – created by default, even without registration, when two or more persons run a business together for profit. Personal liability of partners is not limited, unless they are limited partners of a limited partnership. Partnerships are governed by the Partnerships Ordinance [New Form], 5735-1975 (פקודת השותפויות [נוסח חדש], תשל"ה-1975).
On the other hand, if you are not responsible for its tax, then you should declare the equipment in Part III of the Business Property Statement (Equipment belonging to others). Where equipment is declared in Part III of the Business Property Statement, the Assessor will also send a Notice to File to the person reported as the equipment's actual owner.