This study seeks to evaluate the efficacy of the Pakistani Code of Corporate Governance by finding out its impact on firm's performance and efficiency. This exploration is done in the context that Securities & Exchange Commission of Pakistan's choice of corporate governance regulations is heavily influenced by Anglo-Saxon approach, whereas de-facto realities of Pakistani corporate environment are quite in contrast.Using a panel data of 119 firms for the period of 8years i.e. 2003 to 2010, and using a multidimensional performance framework i.e. financial performance and technical efficiency, we find that the extent of compliance has increased since the issuance of code in 2002. After controlling for firm size, growth, dividend payout, age and leverage, we find significant positive impact of compliance on firm's performance (ROA, ROE and ROCE). We also find a weak positive relationship between compliance and technical efficiency. We suggest that compliance is not linearly related with financial performance and we find that high compliant firms are less profitable than average or low compliant firms. This implies that one-size-fit all approach along with mandatory compliance is a questionable approach for Pakistani firms.This study is first in Pakistan in providing empirical evidence on efficacy of the rule-based Code of Corporate Governance and also adds to growing but underdeveloped literature on compliance and firm performance in emerging/developing economies. Further, this study offers insight to policy makers on the efficacy of current corporate governance regulations and offers a research framework for assessing the extent of compliance, effectiveness and economic impact of code of corporate governance.