Legal provisions for citizens' initiatives at national level

The right for petitions is guaranteed by the Constitution of the Republic of Estonia (p. 46):  https://www.riigiteataja.ee/en/eli/530102013003/consolide

And it is regulated by https://www.riigiteataja.ee/en/eli/507042014003/consolide

Even though the Constitution of the Republic of Estonia gives the right for petitions, it was not regulated by a law until 2014. As a result of a policy crowdsouring initiative Rahvakogu (People's Assembly), the relevant amendment was introduced to the Response to Memoranda and Requests for Explanations and Submission of Collective Addresses Act: https://www.riigiteataja.ee/en/eli/507042014003/consolide