The scarcity of space as a resource and dynamic social changes call for rational management of the available land. However, many countries today struggle with inefficient space management. One of the relevant issues is the surplus of land zoned as buildable. The paper investigates whether one of such countries, Poland, has developed an effective tool to resolve the issue. The paper analyses literature, government reports and opinions, and discourses of spatial planners and identifies primary drivers of changes in buildable land zoning policies introduced to the Polish spatial planning law in 2015. It focuses on one factor particularly, the overestimation of the demand for buildable land. An analysis of masterplans drafted according to the new regulations revealed that the new policy that seemingly offered alternative and effective tools for controlling buildable land overzoning turned out to be ambiguous and ineffective. Consequently, the regulations failed to eliminate the abuses they were designed to control. The example of the Polish planning regulations shows that ambiguous laws fail to produce the expected results and need to be specified more precisely, particularly regarding nomenclature, even if the intention behind them is good.

空间作为一种资源的稀缺性和动态的社会变化要求对可用土地进行合理管理。然而，当今许多国家都在为低效的空间管理而苦苦挣扎。相关问题之一是划为可建设土地的过剩。该文件调查了其中一个国家波兰是否已经开发出解决该问题的有效工具。本文分析了文献、政府报告和意见以及空间规划者的话语，并确定了 2015 年波兰空间规划法引入的可建设用地分区政策变化的主要驱动因素。它特别关注一个因素，即高估可建设用地的需求土地。对根据新规定起草的总体规划的分析表明，新政策看似提供了控制可建设用地过度分区的替代和有效工具，但结果却模棱两可且无效。因此，法规未能消除它们旨在控制的滥用行为。波兰规划法规的例子表明，模棱两可的法律无法产生预期的结果，需要更准确地说明，特别是在术语方面，即使它们背后的意图是好的。