www.ey.com/en_gl/tax-alerts/colombia-issues-regulations-to-identify-preferential-tax-regimes
news.bloombergtax.com/daily-tax-report-international/colombia-president-posts-decree-explaining-preferential-tax-regime-rules
www.orbitax.com/news/archive.php/Colombia-Publishes-Decree-Expl-48178
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