Allowed adverbs are provided in this article. The words listed here are commonly found along with the verb allowed in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb ALLOWED.
accordingly, actually, annually, apparently, barely, carelessly, certainly, cheerfully, clearly, commonly, consciously, consequently, constantly, conveniently, courteously, currently, daily, definitely, deliberately, duly
easily, effectively, equally, essentially, eventually, evidently, explicitly, expressly, fairly, finally, foolishly, formally, formerly, frankly, freely, frequently, fully, generally, generously, gladly
graciously, gradually, grudgingly, happily, hardly, historically, immediately, improperly, imprudently, inadvertently, initially, intentionally, invariably, justly, kindly, knowingly, largely, lately, legally, liberally
mercifully, merely, naturally, nearly, necessarily, negligently, normally, occasionally, officially, openly, ordinarily, originally, passively, patiently, practically, presently, previously, probably, properly, publicly
purposely, quickly, quietly, rarely, readily, really, reasonably, recently, regularly, reluctantly, repeatedly, routinely, safely, scarcely, silently, simply, slowly, specially, specifically, subsequently
suddenly, tacitly, technically, theoretically, traditionally, truly, typically, ultimately, unanimously, unconsciously, unfortunately, universally, unwisely, unwittingly, usually, weakly, willingly, wisely
Hope this word list had the allowed adverb you were looking for. In addition to adverbs used with allowed, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.