18. Is there a limit on the amount a donor can contribute to a candidate?

Source: Chapter 12 (Mode of Spending), Handbook for Candidates 2013

It must be borne in mind that no other deposit can be made in the campaign account except the contributions received from Political Party in the case of National Assembly. 

Source: Chapter 7 (65): Public Election Act of the Kingdom of Bhutan, 2008

No political party shall accept financial contributions or in kind contributions, other than those voluntarily offered to it by any of its registered members, of an amount or value exceeding Ngultrum 100,000/- per member per year or as may be fixed by the Election Commission from time to time. 

Limit to candidate not specified directly but through the limit of contributions to the political party.