הַמַּקְנֶּה בֵּין קַרְקַע בִּין מִטַּלְטְלִין וְהִתְנָה תְּנָאִין שֶׁאֶפְשָׁר לְקַיְּמָן. בֵּין שֶׁהִתְנָה הַמַּקְנֶה בֵּין שֶׁהִתְנָה הַקּוֹנֶה. אִם נִתְקַיְּמוּ הַתְּנָאִין נִקְנָה הַדָּבָר שֶׁהֻקְנָה. וְאִם לֹא נִתְקַיֵּם הַתְּנַאי לֹא קָנָה. וּכְבָר בֵּאַרְנוּ מִשְׁפְּטֵי הַתְּנָאִים בְּהִלְכוֹת אִישׁוּת:
When a person transfers ownership of an article - whether landed property or movable property - and establishes conditions that can be fulfilled the conditions are binding - whether established by the seller or the purchaser. If the conditions are fulfilled, then the ownership of the object is transferred. If the conditions are not fulfilled, the ownership of the object is not transferred. We have already described the laws governing conditional agreements in Hilchot Ishut.
