Law establishing or aggravating liability: Authorship of the question: Vladimir Alexandrovich Ershov Leave feedback < on the question / Report an error Choose one correct answer has no reverse force may be retroa ctive if it is established by this law may be at the discretion of the

The correct answer is: may be retroactive if it is established by this law.<br /><br />Explanation: The question is asking about the characteristics of a law that establishes or aggravates liability. The correct answer is that such a law may be retroactive if it is established by this law. This means that the law can apply to actions or events that occurred before the law was enacted, if the law specifically states that it is retroactive.